Year 5 Reading Challenge.

Hi Year 5,

Your challenge is to read through this article (click on the link): http://www.theguardian.com/environment/live/2014/aug/27/do-dams-destroy-rivers

The article is on whether dams destroy rivers – you need to read it through all the way to the end (you may need to look up any words you are unfamiliar with). This is a challenging piece, but it is an opportunity to push yourself.

BRONZE CHALLENGE:

Identify the facts and opinions in the article.

SILVER CHALLENGE:

Identify the opinions and write the alternative viewpoints for each opinion.

GOLD CHALLENGE:

List the facts present and then use these to write a balanced argument about whether dams are good thing or not. You need to explain your answer, using the facts you have listed.

Give this a really good go Year 5 – you have all made some brilliant progress this year, this is an opportunity to show it off!

Good luck,

Mrs Mahtani and Miss Redhead

50 thoughts on “Year 5 Reading Challenge.

  1. Bronze
    Facts:
    Dams do change the world and its natural environment and so do cities , roads , airports , chemical industries and agriculture . In general ,we can say that people change their environment.
    opinion:
    The benefits that hydroelectricity brings to communities – cheap , clean power , jobs, tax etc. Contrary to popular belief, hydroelectricity power can seriously damage the climate.

  2. Fact
    Most dams are not best practice
    I know this is a fact because before the sentence it said fact and this is how I know this is a fact.

  3. Bronze

    Opinions
    The good news is that is not only more vulnerable to dams than was realised. It’s also more resilient than we thought.
    So maybe the destruction of a river by damming it isnt terminal.
    Indeed dams do change the world it’s natural environment.
    So do cities road airports chemical industries and agriculture.
    In general we can say that people change their environment.
    The richer their are the more change they induce.
    In the course of that they often destroy species they also create species but that is not often measured or mentioned.

  4. Fact
    Most dams are not best practise.
    Opinion many of the dams built during the 20th century have proven to be river killers.
    Fact
    The Rams are effecting the environment

  5. BRONZE
    Dams do change planet earths environment and of course our polluting machines which wreck us but most of all,it the loss of our oxygen supplies like trees.Really,in general we change everything,normally business people get the better side of things, they create power plants that will surely have an effect on the ecosystem .If people want to argue they show their points physically,people are damaged by their own creations.We are trying to make the world a much better more adapted place,WE are making the world die,WE also kill innocent animals day by day.

  6. Bronze
    Opinion( In general, we can say that people change their environment. The richer they are, the more change they induce.)
    Fact(In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.)
    Fact(In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.)
    opinion(As an example, sedimentation as a process is the base of geology, many millennia old, many thousands of metres deep.)
    Fact(So the IRN’s latest database is simply that a collection of data of variable quality with no inherent information about whether what is happening is good or bad.)
    Opinion(What we need to take from this debate is the realisation that we now live in an anthropocene world, whose form is increasingly structured and sustained through human decision)
    Fact(We can take deliberate decisions about what kind of world we want to live in.)
    Fact(It is local and larger communities, taking decisions through their own institutions at different levels and not trying to impose their value sets on others.”)

  7. Silver
    Dams do not damage climates they are perfectly harmless, they are just used for people to walk down roads and stop water going into people’s houses. They shouldn’t be stopped because they stop fluids coming into people’s houses.

    Most dams are not killer rivers most animals die from eat plastic bags because they look like jelly fish . It is not our fault that they can’t see.

  8. Bronze:
    Fact:Indeed, dams do change the world and its natural environment.Opinions:
    The benefits that hydroelectricity brings to communities – cheap, clean power, jobs, tax etcContrary to popular belief, hydroelectric power can seriously damage the climate.
    Many of the dams built during the 20th century have proven to be river killers. Examples are numerous and notorious.

  9. Bronze

    Fact indeed dams do change the world its natural environment.
    Opinione benefits that hydro3lectricity brings to communities cheap clean power jobs tax.
    Outweigh the ecological and social domage done.

    Opinion
    The good news is that nature is not only more vulnerable to dams than was ealised its also more resilient than we thought.
    So maybe destruction of ariver by damming it isnt terminal.
    Indeed dams di change the world and its natural environment.
    So docities rods airports chemical industries and agriculture.
    In general all we can say that people change their environment the richer they are the more change they induce.

    Silver
    Dams dont damage climate they are perfectly harmless they are just used for people to get down the road and stop water coming into poeple houses and this information.
    Many dams are not killer most animals die fomeating.plastic bags and it is not our fault that animals dont know what anything is they should have some.

    Gold
    Dams have advantages and disavantage on our planet. But are they helful. Home people belive dams are eflecting nature and animals however some people think dams are good as they are protecting us and their. First of all dams have been tinaun to protest us. From floods and revent the loss of life Earth.

  10. Bronze
    Facts
    Indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they induce.In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.

    Opinions
    Many of the dams built during the 20th century have proven to be river killers.

  11. Bronze
    Facts
    The major fact in the article is that Dams has impact on natural environment and they change the world.

    The notion that some static measure of biodiversity is good and any change is bad is not substantiated by natural history. As an example, sedimentation as a process is the base of geology, many millennia old, many thousands of metres deep.

    IRN’s latest database is simply that:- a collection of data (of variable quality) with no inherent information about whether what is happening is good or bad.

    Opinion
    In general people can change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.

    What we need to take from this debate is the realisation that we now live in an anthropogenic world, whose form is increasingly structured and sustained through human decision. We can take deliberate decisions about what kind of world we want to live in.

    But that WE is not a small group of North American environmentalists and their friends. It is local and larger communities, taking decisions through their own institutions at different levels and not trying to impose their value sets on others.
    Silver
    People change their environment for the betterment for future generation. There may be some impact on environments such as river which needs to be measured.

    If we take a thoughtful decision about climate control such as making new dams and saving rivers we can make this world a better place to live. For example how we can manage impact of global warming.

  12. Bronze
    Fact:Indeed, dams do change the world and its natural environment.

    opinione:enefits that hydroelectricity brings to communities – cheap, clean power, jobs, tax etc – outweigh the ecological and social damage done.

    Fact:(NPP; essentially CO2 intake by plants during photosynthesis minus CO2 release during respiration) decreased by 8.0%, largely as a result of population resettlement and land inundation.

    opinion: Contrary to popular belief, hydroelectric power can seriously damage the climate.

    Fact:Hydroelectric dams produce significant amounts of carbon dioxide and methane, and in some cases produce more of these greenhouse gases than power plants running on fossil fuels.

  13. Are dams good or bad?
    Welcome to our study which has focused on dams and their positive and negative impact on rivers.First of all, a dam is defined as a barrier that is constructed to hold back water and raise its level.In my opinion, I believe that dams can have a double sided effect which means that although they have huge benefits, they may have bad consequences.

    First and foremost, dams help flood control of water in rivers because they work as barriers that monitor and organize the way water flows and generates from rivers.This done by releasing water under control to the river or storing it for other uses.On the other hand,dams can cause damage to river by effecting rivers structures and systems really badly because dams constrain water and forbid it from natural flooding.

    It has been also found that dams have a positive impact on the ecological system in the surrounding environment of rivers. for example, dams improve the agricultural systems and improve water flooding so that crops can grow in a better fertilizing conditions. However, some ecological scientists, who argue against dams construction, listed several bad consequences of dams.They stated that dams prevent fish and other creatures from benefiting from natural water conditions. Fish, for instance, may stop migrating to their habitats and therefore a huge amount of fish die.Also on the social and economic side, people are forced to leave their homes and the housing system can be affected as a result of building dams in urban areas. An opinion, found in one of the reports, says” Flood can cause major damage to human lives, property and live stocks,Cities and towns have been devastated due to flood damage, lives have been lost and homes.”

    To conclude this argument, dams can have advantages and disadvantages. But I mostly believe that dams’ negative effects are much greater than their benefits since most evidence available so far from the internet and different reports I read and searched convinced me that dams have negative consequences. Therefore, there should be a great necessity for dams to be built, otherwise, it is better to avoid building them.
    Z.AJ

  14. Bronze
    Facts:

    Sports day for Key Stage 2 on the 4th July.

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    Reading Challenge

    Year 5 Reading Challenge.
    Posted on 26 May, 2016 by Mrs Mahtani
    Hi Year 5,
    Your challenge is to read through this article (click on the link): http://www.theguardian.com/environment/live/2014/aug/27/do-dams-destroy-rivers
    The article is on whether dams destroy rivers – you need to read it through all the way to the end (you may need to look up any words you are unfamiliar with). This is a challenging piece, but it is an opportunity to push yourself.
    BRONZE CHALLENGE:
    Identify the facts and opinions in the article.
    SILVER CHALLENGE:
    Identify the opinions and write the alternative viewpoints for each opinion.
    GOLD CHALLENGE:
    List the facts present and then use these to write a balanced argument about whether dams are good thing or not. You need to explain your answer, using the facts you have listed.
    Give this a really good go Year 5 – you have all made some brilliant progress this year, this is an opportunity to show it off!
    Good luck,
    Mrs Mahtani and Miss Redhead
    This entry was posted in Reading Challenge and tagged Reading Challenge Summer 2 2016. Bookmark the permalink.
    30 thoughts on “Year 5 Reading Challenge.”

    Destiny Mccusker
    says:
    29 June, 2016 at 1:13 pm
    Bronze
    Opinions
    Indeed, dams do changes the world and its natural environment.
    So do cities,roads, airports,medical industries and agriculture.
    We can make deliberate decisions about what kind of world we want to live in.
    The richer they are,the more they endure.
    REPLY
    Kamilah-Nailah Nkundabagenzi
    says:
    29 June, 2016 at 1:08 pm
    Gold :
    Today I talk about is damps good or bad ?
    Damps are both positive and negative .how it is negative is is it dirty the river and stream and other.it is positive because you get ride of your mess but it infects the environment and hurt the wildlife and the animals.It my infect all of our life’s with the pollution.
    REPLY
    Summayah Abraz
    says:
    29 June, 2016 at 12:58 pm
    Silver
    The opinion I chose was:
    The Nile – which is the longest river in the world – travels through ten countries. Four of these countries are “water scarce” and the river is the primary water source of Sudan and Egypt. Its basin covers 10% of the landmass of the African continent.
    I have changed it to:
    The river Nile (the longest river in the world) it goes through ten countries. The river is the primary water source of Sudan – Sudan is in Egypt-it’s basin covers 10% of the African continent
    REPLY
    Weli Sharif
    says:
    29 June, 2016 at 12:58 pm
    I know this is an opinion as it says perspective from Mike muller and perspective means a point of view if it was a fact it wouldn’t sat persoective.
    REPLY
    Habib Uddin
    says:
    29 June, 2016 at 12:57 pm
    Fact
    Most dams are not best practice
    I kon this is a fact because at the start it said fact.
    REPLY
    Zeid Elmesalati
    says:
    29 June, 2016 at 12:42 pm
    Silver
    Many dams have proven to be river killers
    Personally,I passionately believe dams help the environment and helps our safety.whithout dams there will be way more floods happening in the world and places were there’s often floods (such as Bangladesh) would be in grave danger.Therefore, in my opinion dams are amazing.
    REPLY
    Anton Smith
    says:
    29 June, 2016 at 12:39 pm
    Fact
    Indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.The notion that some static measure of biodiversity is good and any change is bad is not substantiated by natural history. As an example, sedimentation as a process is the base of geology, many millennia old, many thousands of metres deep.
    opinion
    Ultimately dams change rivers. The degree to which they change and the negative impacts on humans and nature depend on how large they are, how they are built and managed and where they are located.Many of the dams built during the 20th century have proven to be river killers. Examples are numerous and notorious.”
    REPLY
    Sadia Parveen
    says:
    29 June, 2016 at 8:21 am
    Silver
    The opinions that I had changed for the alternatives are:
    Many dams were built in the 20th century and some are not killers
    In my opinion I believe that some dams are killers but some are really not that bad because the chemicals in the dams are not that bad.
    The next opnion I have changed is
    Fishes and other sea creatures live in flowing water and not a standing lake created by dams
    Well even though these sea creatures can’t really live in dams they decide to live in flowing and possibility clean water.
    REPLY
    Ryan Wali
    says:
    28 June, 2016 at 9:22 pm
    BRONZE:
    OPINION:The richer they are the more change they induce.
    FACT:In the coruse of that they often destroy speices.
    FACT:They also create spiecies,but that is not often measured or menstioned.
    FACT:AS an example sedamentation as a process is the base of geolgy,many melenia old,many thousends of meters deep.
    OPINION:We can take deliberte deciions about what kind of world we live in.
    OPINION:But WE is not a small group of south American environmentilst and their freinds.
    REPLY
    Humaira Begum
    says:
    28 June, 2016 at 8:48 pm
    Gold
    Are dams good or not?
    Dams have many good impacts on our environment,however they also have bad impacts on our environment. Its confusing to say we should remove them because thay can help us sometimes same with saying don`t remove them because they can damage our rivers.This text will explain to you the good and bad impacts on our environment if we have dams.
    Firstly,dams are a great way to stop droughts. For example, there was a drought in the Horn of Africa which caused the death of millions of people, however the dam in Egypt spared them from a drought which would have been a complete disaster.This is how we know dams are very good for our environment.
    However,some people may say that dams destroy our rivers. This is true that dams destroy rivers and the use of them.The Nile river runs through 10 countries.Four of the countries are water scarce which means they have lack of water. They could use the water from the Nile ,however there is not enough water for them to drink . This is because the dams have had a major change on the rivers flow. This made the water in the Nile evaporate. The dams have also altered ecosystem fuctions. This makes the river no use to the four countries who have lack of water. What is the point of dams if it is just going to make peoples lives worse because they don`t have water?
    In conclusion,dams are good at times and bad at times. I personally believe that we shouldn`t have dams as they have many bad effects on our environments such as lack of water.I wouldn`t like to be one of those thirsty people and I am sure you wouldn`t want to be them either. So I think all the dams should be removed as it will make our environment a better place for everyone. Also,the rivers will be useful because there would be a purpose for it to be there.
    REPLY
    Baldeep Jassi
    says:
    28 June, 2016 at 6:21 pm
    Are dams good or bad?
    Today I will be discussing about whether dams are beneficial or not. A dam is a barrier that impounds water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for such activities as irrigation, human consumption, industrial use, agriculture, and navigability. They have been known to mostly be found in USA, India, Egypt, China and Canada.
    Firstly, dams helps flood control. Dams help prevent the loss of life and property caused by flooding. Flood control dams impound floodwaters and then release them under control to the river below the dam or store or divert the water for other uses.
    For centuries, people have built dams to help control devastating floods. Also did you know that a car can be taken away in as little as 2 feet of a flood. A man says that “Flood can cause major damage to humans lives, property, and livestocks. Cities and towns have been devastated due to flood damage, lives have bees lost and homes. Do you want people go through this dreadful tragedy.”
    Secondly, dams saves energy. The United States is one of the largest procedures of hydropower in the world, second only Canada. Dams produce over 108,800 megawatts of renewable electricity and meet 8 to 12 percent of the nations power needs. Hydropower is considered clean because it does not contribute to global warming, air pollution, acid rain or ozone depletion. A manager, who work at dams, quotes “In the U.S, 39% of energy is being wasted each year and this becoming a problem day after day. And this absolutely is a disgrace. Did you know we can save over 5000 dollars.”
    Thirdly, dams help in irrigation. Presently, irrigated land covers about 277 million hectares i.e. about 18% of world’s arable land but is responsible for around 40% of crop output and employs nearly 30% of population spread over rural areas. With the large population growth expected for the next decades, irrigation must be expanded to increase the food capacity production. It is estimated that 80% of additional food production by the year 2025 will need to come from irrigated land.Ten percent of American cropland is irrigated using water stored behind dams. Thousands of jobs are tied to producing crops grown with irrigated water.
    Despite dams being beneficial, they have been known to affect the environment. Operating a hydropower can change the water’s temperature and the river’s flow, leading to harm native plants and sea creatures in the river. Because of dams, salmon must swim upstream to their spawning grounds to reproduce, but the series of dams get into their way. Dams also blocks fish migration, which some species completely separates spawning habitats. A researcher found out that in 2002, low flows below dams killed thousands of salmon on the Klamath.
    Moreover, dams affects climate change. Large dams are one of the single most important contributors to global warming, releasing 104 million metric tonnes of methane each year. 52,000 dams contribute more than 4% of the total warming impact of human impact. One year’s large dam methane emissions, have a global warming impact over 20 years equivalent to that of 7.5 billion tonnes of carbon dioxide. A scientist says “A growing number of scientific studies indicate that reservoirs, especially in the tropics, are a significant source of global greenhouse gas pollution.
    Lastly, dams have displayed people. Dams have displayed an estimated a 80 million people, with 23 million alone in China. Dams haves also negatively impacted about 500 million people living downstream. People who have been displayed have lost land, homes, irrigation schemes, food and water. Others have suffered from diseases dams bring.
    To conclude, I have researched about for and against points. However I personally believe that dams are not beneficial because dams have been killing fish, ruining the environment, releasing toxic chemical, forcing people to loose all their homes, as scientists say their are other simpler ways.
    REPLY
    Zaid Abujebbeh
    says:
    27 June, 2016 at 6:11 pm
    Silver:
    These are the opinions which I can change and find alternatives for:
    1.Many dams built in the 20th century have proven to be river killers.
    In my opinion, I believe that dams have an extremely big and positive effect on biodiversity and ecosystem.In fact dams do not cause damage to the rivers ,their system and their structures because they help flood control and river navigation.
    2.Species live in flowing river than the standing lakes created by dams.
    Although dams are not good for different species of sea creatures, for example dams are not good for fish migration and may cause decline in the number of fish migrating, fish can live in dams.According to a website, I found out that fish can live in dams if the suitable food and healthy conditions are provided.Some dams have fertilisers to feed fish so they can survive.
    3.Dams, however, do have immense destructive impacts, but these are primarily of social nature: the forced physical and economic displacement of huge cumulative amounts of people to create rooms for dams and their reservoirs.
    I believe that dams, can cause no harm on many things like buildings, humans and biodiversity.This could happen by building dams in deserted areas and empty places.If this happens people and wildlife would be protected from risk and danger mean whilst dams can be built safely for the benefit of rivers.
    REPLY
    Fatima Ghaffar
    says:
    26 June, 2016 at 7:05 pm
    Gold challenge
    Are dams good?
    On our planet we have loads of dams but are they good or are they bad?Loads of people think rivers can affect and disturb our natural habitats even the animals but on the other hand people say it protects our rivers.Tropical and MULTI-tropical rivers or dams are extra hazardous to us but others who have said they protect rivers take no notice.
    Collin Thorne has said for the question about dams the short answer is a yes they do destroy rivers whereas loads of other people do not believe this statement and carry on with their on thoughts but later will realise because of their health conditions.
    Dams have been known to protect us from floods and prevents the loss of life on Earth.Dams controls rivers and make floods unlikely however it could be argued that dams block the migration and path of dams and could trap no kill them.
    Dams have good and bad advantages.🐠🐠🌊🌊🏝🏖🏞🗾
    REPLY
    Mihir Sharma
    says:
    26 June, 2016 at 7:01 pm
    Today’s discussion is, are dams good or bad?
    Dams have both positive and negative impact on our environment and eco system. The construction of Dam do cause damage to the rivers and effect the biodiversity but the amount of damage is related to how big the dam is and how it is build and managed.
    We live in Anthropocene world which is increasingly getting structured and influenced by human decisions. We have to take decision to make our life comfortable but at the same time do it in such a way that it has least possible damage on environment. Eg “the drought in the Horn of Africa was a disaster that cost the lives of millions, but the High Assam Dam spared Egypt from a drought that would have been truly catastrophic,”
    A poorly designed dam will have more negative effect which can be reduced by a properly managed dam. “Generally, large scale hydropower incurs excessive losses – whereas small or micro hydropower, sensitively installed and operated can offer very significant biodiversity and economic gains that could be vital at a local level.”
    Another major damage caused by the dams is the sedimentation problem, many rivers bring fine sediments from mountains and deliver it to farmlands which is vital for good yield of farming. This sedimentation benefit is reduced or removed post dam construction.
    Dams do have negative impact on river ecologies but they also bring irreplaceable benefits such as more irrigated agricultural land, clean energy and saves lives of millions by better flood control management.
    REPLY
    Mihir Sharma
    says:
    26 June, 2016 at 7:02 pm
    The post was for GOLD.
    REPLY
    Ali Hameed
    says:
    26 June, 2016 at 6:01 pm
    Bronze
    Opinion It is really sad that weather dams are killing the most wonderful city and the rivers .
    Opinion: the dams have proven to
    be river killers.
    Fact:Dams do change.
    REPLY
    Hanaan Finger
    says:
    26 June, 2016 at 4:30 pm
    bronze
    fact:most dams are not best practise
    opinion:
    The notion that some static measure of biodiversity is good and any change is bad is not substained by natural history.This is an opinion because it’s what he believes.
    fact:
    The ten least fragmented river systems found by the study were all located in developing countries. Five in South America, two in China and Africa and one in Southeast Asia.
    opinion:
    The benefits that hydroelectricity brings to communities – cheap, clean power, jobs, tax etcContrary to popular belief, hydroelectric power can seriously damage the climate.
    Many of the dams built during the 20th century have proven to be river killers. Examples are numerous and notorious.
    fact:
    Indeed dams do change the world and it’s natural environment.So do cities,roads,airports,chemical industries and agirculture. In general, we can say people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.
    REPLY
    Alishba Khan
    says:
    26 June, 2016 at 4:27 pm
    Bronze
    Facts : Dams do change the world and its natural environment and so do cities , roads , airports , chemical industries and agriculture . In general ,we can say that people change their environment . The richer they are ,the more change they induce. In the course of that ,they often destroy species;they also create species ,but that is not often measured or mentioned.
    Opinions
    The benefits that hydroelectricity brings to communities – cheap ,clean ,power ,jobs , tax etc – outweigh ecological and social damage done. Many of the dams built during the 20th century have proven to be river killers. Examples are numerous and notorious. Contrary to popular belief ,hydroelectric power can seriously damage the climate .
    REPLY
    Momina Shafique
    says:
    26 June, 2016 at 3:20 pm
    BRONZE
    Opinions
    The good news is that nature is not only more vulnerable to dams than was realised, it’s also more resilient than we thought. So maybe the destruction of a river by damming it isn’t terminal.
    “Indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.
    THIS is an opinions because it is the perspective of Mike Muller
    Silver
    Dams don’t damage climate they are perfectly harmless,they are just used for people to get down the road and stop water coming into people’s houses and this is false information
    Many dams are not killer rivers most animals die from eating plastic bags and it is not our fault that animals don’t know what anything is, they should have some sense.
    Gold:
    ARE DAMS GOOD ?
    Dams have advantages and disadvantages on our planet.But are they helpful? Some people believe dams are effecting nature and animals however some people think dams are good as they are protecting us and the rivers.
    First of all dams have been known to protect us from floods and prevent the loss of life on Earth.Dams control rivers and make floods more unlikely.However it could be argued that dams block the migration of fish and kill them as they swim into the dams as some times the water is cleaned or sent to different places.
    A group of scientists have said hydropower is one of the main uses for dams and less than 3 percent of existing dams produce hydroelectricity. Hydropower is the largest source of renewable electricity in the U.S. In addition to providing baseload and peaking power hydropower projects also keep electrical transmission systems working smoothly.But on the on the other hand a group of people have said more than a 1000 dams in the u.s.a have collapsed or have been removed.When dams are not properly built or maintained they can break. In the world’s biggest dam disaster, the failure of China’s Banqiao Dam killed an estimated 171,000 people in 1975.
    REPLY
    Bailey-Jo Adams
    says:
    26 June, 2016 at 2:11 pm
    Bronze challenge
    Opinions
    Indeed dams do change the world and it’s agriculture.In general we can say that people change their environment.I know this is an opinion because it’s saying what he thinks.The richer they are , the more change they include.
    Fact: In the course of that they often destroy species ,but that is often measured or mentioned. I know that this is a fact because it is known and proved to be true.
    Opinion
    The notion that some static measure of biodiversity is good and any change is bad is not substained by natural history.This is an opinion because it’s what he believes.
    REPLY
    Lea Colak
    says:
    26 June, 2016 at 2:06 pm
    bronse
    fact.The notion that some static measure of biodiversity is good and any change is bad is not substantiated by natural history. As an example, sedimentation as a process is the base of geology, many millennia old, many thousands of metres deep
    i know this because it said fact
    oppinion
    indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they inducen
    REPLY
    Zaid Abujebbeh
    says:
    26 June, 2016 at 1:41 pm
    Bronze:
    The article has listed a number of facts and opinions about dams and their role in damaging rivers. Some of the facts and opinions were for dams while others were against the whole idea of building dams. The following are the key facts and opinions I found in the article:
    Opinions
    1.Indeed, dams do change the world and it’s natural environment.
    2.Ultimately dams change rivers.The degree to which they change and the negative impacts on humans and nature depend on how large they are, how they are built and managed and where they are located.
    3.Many of the dams built in the 20th century have proven to be river killers
    4.The richer they are, the more change they induce.
    Facts
    1.The ten least fragmented river systems found by the study were all located in developing countries.Five in South America,two in China and Africa and one in Southeast Asia.
    2.The drought in the Horn of Africa was a disaster that cost the lives of millions.
    REPLY
    Ahlam Mohammed
    says:
    26 June, 2016 at 1:41 pm
    Bronze
    opinions
    Indeed dams do change the world and it’s agriculture.In general we can say that people change their environment.I know this is an opinion because it’s saying what he thinks.The richer they are , the more change they include.
    Fact: In the course of that they often destroy species ,but that is often measured or mentioned. I know that this is a fact because it is known and proved to be true.
    Opinion
    The notion that some static measure of biodiversity is good and any change is bad is not substained by natural history.This is an opinion because it’s what he believes.
    REPLY
    Daniel Dadkhah
    says:
    26 June, 2016 at 12:43 pm
    Gold:
    ARE DAMS GOOD ?
    Dams have advantages and disadvantages on our planet.But are they helpful? Some people believe dams are effecting nature and animals however some people think dams are good as they are protecting us and the rivers.
    First of all dams have been known to protect us from floods and prevent the loss of life on Earth.Dams control rivers and make floods more unlikely.However it could be argued that dams block the migration of fish and kill them as they swim into the dams as some times the water is cleaned or sent to different places.
    A group of scientists have said hydropower is one of the main uses for dams and less than 3 percent of existing dams produce hydroelectricity. Hydropower is the largest source of renewable electricity in the U.S. In addition to providing baseload and peaking power hydropower projects also keep electrical transmission systems working smoothly.But on the on the other hand a group of people have said more than a 1000 dams in the u.s.a have collapsed or have been removed.When dams are not properly built or maintained they can break. In the world’s biggest dam disaster, the failure of China’s Banqiao Dam killed an estimated 171,000 people in 1975.
    People from jobs like fire men or farmers have said dams create reservoirs throughout the United States that supply water for many uses, including industrial, municipal, and agricultural.
    So I think we should only keep dams in places that we need them like places that are mainly flooded or places with wild rivers or we should change dams and make them more safe because I strongly believe dams have a bad impact on the planet.
    REPLY
    Siham Aden
    says:
    26 June, 2016 at 12:40 pm
    bronze
    fact: the rams are effecting the enivrioment that is really sad.
    opinion : I think it is really bad if you effect it that is really bad.
    fact: if you effect the eniviroment you effecting other animals
    REPLY
    Hasan Memi
    says:
    26 June, 2016 at 11:33 am
    BRONZE
    Opinions
    The good news is that nature is not only more vulnerable to dams than was realised, it’s also more resilient than we thought. So maybe the destruction of a river by damming it isn’t terminal.
    “Indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.
    THIS is an opinions because it is the perspective of Mike Muller
    REPLY
    Samuel Masterson
    says:
    26 June, 2016 at 11:03 am
    BRONZE
    __________________________________________________________________
    Facts: Indeed dams do change the world and it’s natural environment.So do cities,roads,airports,chemical industries and agirculture. In general, we can say people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.The ten least fragmented river systems found by the study were all located in developing countries. Five in South America, two in China and Africa and one in South East Asia
    __________________________________________________________________
    Opinions:
    The benefits of hydroelectricity brings to communities- cheap, clean power,jobs,tax etc. contrary to popular belief, hydroelectric power can seriously damage the climate. Most of the dams built in the 20th century have proven to be river killers. Examples are numerous and notorious.
    REPLY
    Omio Bhattacharjee
    says:
    25 June, 2016 at 7:24 pm
    Bronze
    Facts:Indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.The ten least fragmented river systems found by the study were all located in developing countries. Five in South America, two in China and Africa and one in Southeast Asia.
    Opinions:
    The benefits that hydroelectricity brings to communities – cheap, clean power, jobs, tax etcContrary to popular belief, hydroelectric power can seriously damage the climate.
    Many of the dams built during the 20th century have proven to be river killers. Examples are numerous and notorious.
    Silver
    Dams don’t damage climate they are perfectly harmless,they are just used for people to get down the road and stop water coming into people’s houses and this is false information
    Many dams are not killer rivers most animals die from eating plastic bags and it is not our fault that animals don’t know what anything is, they should have some sense.
    REPLY
    Mia Mattu
    says:
    25 June, 2016 at 12:15 pm
    BRONZE
    Fact
    The ten least fragmented river systems found by the study were all located in developing countries. Five in South America, two in China and Africa and one in Southeast Asia.
    Indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.
    the drought in the Horn of Africa was a disaster that cost the lives of millions.
    Opinions
    Many of the dams built during the 20th century have proven to be river killers. Examples are numerous and notorious.
    the benefits that hydroelectricity brings to communities – cheap, clean power, jobs, tax etc
    Contrary to popular belief, hydroelectric power can seriously damage the climate.
    REPLY
    Bronze
    Opinions:
    Indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.The notion that some static measure of biodiversity is good and any change is bad is not substantiated by natural history. As an example, sedimentation as a process is the base of geology, many millennia old, many thousands of metres deep.So the IRN’s latest database is simply that:- a collection of data (of variable quality) with no inherent information about whether what is happening is good or bad.What we need to take from this debate is the realisation that we now live in an anthropocene world, whose form is increasingly structured and sustained through human decision. We can take deliberate decisions about what kind of world we want to live in.
    Facts
    The ten last fragmented river systems found by the study were all located in developing countries. Fire in south America,two in China and Africa and one in Asia

    • Bronze
      Opinions:
      Indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.The notion that some static measure of biodiversity is good and any change is bad is not substantiated by natural history. As an example, sedimentation as a process is the base of geology, many millennia old, many thousands of metres deep.So the IRN’s latest database is simply that:- a collection of data (of variable quality) with no inherent information about whether what is happening is good or bad.What we need to take from this debate is the realisation that we now live in an anthropocene world, whose form is increasingly structured and sustained through human decision. We can take deliberate decisions about what kind of world we want to live in.
      Facts
      The ten last fragmented river systems found by the study were all located in developing countries. Fire in south America,two in China and Africa and one in Asia

  15. Bronze
    Facts
    Indeed, dams do change the world and it’s environment. So do cities, roads, airports, chemical industrial and agriculture. In general, we can say that people change their environment. The richer they are , the more change they induce. In the course of that , they often destroy species ; they also create species, but that is not often measured or mentioned. The ten least fragmented river systems found by the study were all located in developing countries. Five in South America, two in China and Africa and one in Southeast Asia.

    Opinions
    The benefits that hydroelectricity brings to communities – cheap , clean power , jobs, tax etc. Contary to popular belief, hydroelectricity power can seriously damage the climate.

  16. Bronze
    Opinions
    Indeed, dams do changes the world and its natural environment.
    So do cities,roads, airports,medical industries and agriculture.
    We can make deliberate decisions about what kind of world we want to live in.
    The richer they are,the more they endure.

  17. Gold :

    Today I talk about is damps good or bad ?
    Damps are both positive and negative .how it is negative is is it dirty the river and stream and other.it is positive because you get ride of your mess but it infects the environment and hurt the wildlife and the animals.It my infect all of our life’s with the pollution.

  18. Silver
    The opinion I chose was:
    The Nile – which is the longest river in the world – travels through ten countries. Four of these countries are “water scarce” and the river is the primary water source of Sudan and Egypt. Its basin covers 10% of the landmass of the African continent.
    I have changed it to:
    The river Nile (the longest river in the world) it goes through ten countries. The river is the primary water source of Sudan – Sudan is in Egypt-it’s basin covers 10% of the African continent

  19. I know this is an opinion as it says perspective from Mike muller and perspective means a point of view if it was a fact it wouldn’t sat persoective.

  20. Silver

    Many dams have proven to be river killers

    Personally,I passionately believe dams help the environment and helps our safety.whithout dams there will be way more floods happening in the world and places were there’s often floods (such as Bangladesh) would be in grave danger.Therefore, in my opinion dams are amazing.

  21. Fact
    Indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.The notion that some static measure of biodiversity is good and any change is bad is not substantiated by natural history. As an example, sedimentation as a process is the base of geology, many millennia old, many thousands of metres deep.

    opinion
    Ultimately dams change rivers. The degree to which they change and the negative impacts on humans and nature depend on how large they are, how they are built and managed and where they are located.Many of the dams built during the 20th century have proven to be river killers. Examples are numerous and notorious.”

  22. Silver
    The opinions that I had changed for the alternatives are:
    Many dams were built in the 20th century and some are not killers
    In my opinion I believe that some dams are killers but some are really not that bad because the chemicals in the dams are not that bad.

    The next opnion I have changed is
    Fishes and other sea creatures live in flowing water and not a standing lake created by dams
    Well even though these sea creatures can’t really live in dams they decide to live in flowing and possibility clean water.

  23. BRONZE:
    OPINION:The richer they are the more change they induce.

    FACT:In the coruse of that they often destroy speices.

    FACT:They also create spiecies,but that is not often measured or menstioned.

    FACT:AS an example sedamentation as a process is the base of geolgy,many melenia old,many thousends of meters deep.

    OPINION:We can take deliberte deciions about what kind of world we live in.

    OPINION:But WE is not a small group of south American environmentilst and their freinds.

  24. Gold

    Are dams good or not?
    Dams have many good impacts on our environment,however they also have bad impacts on our environment. Its confusing to say we should remove them because thay can help us sometimes same with saying don`t remove them because they can damage our rivers.This text will explain to you the good and bad impacts on our environment if we have dams.

    Firstly,dams are a great way to stop droughts. For example, there was a drought in the Horn of Africa which caused the death of millions of people, however the dam in Egypt spared them from a drought which would have been a complete disaster.This is how we know dams are very good for our environment.

    However,some people may say that dams destroy our rivers. This is true that dams destroy rivers and the use of them.The Nile river runs through 10 countries.Four of the countries are water scarce which means they have lack of water. They could use the water from the Nile ,however there is not enough water for them to drink . This is because the dams have had a major change on the rivers flow. This made the water in the Nile evaporate. The dams have also altered ecosystem fuctions. This makes the river no use to the four countries who have lack of water. What is the point of dams if it is just going to make peoples lives worse because they don`t have water?

    In conclusion,dams are good at times and bad at times. I personally believe that we shouldn`t have dams as they have many bad effects on our environments such as lack of water.I wouldn`t like to be one of those thirsty people and I am sure you wouldn`t want to be them either. So I think all the dams should be removed as it will make our environment a better place for everyone. Also,the rivers will be useful because there would be a purpose for it to be there.

  25. Are dams good or bad?

    Today I will be discussing about whether dams are beneficial or not. A dam is a barrier that impounds water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for such activities as irrigation, human consumption, industrial use, agriculture, and navigability. They have been known to mostly be found in USA, India, Egypt, China and Canada.

    Firstly, dams helps flood control. Dams help prevent the loss of life and property caused by flooding. Flood control dams impound floodwaters and then release them under control to the river below the dam or store or divert the water for other uses.
    For centuries, people have built dams to help control devastating floods. Also did you know that a car can be taken away in as little as 2 feet of a flood. A man says that “Flood can cause major damage to humans lives, property, and livestocks. Cities and towns have been devastated due to flood damage, lives have bees lost and homes. Do you want people go through this dreadful tragedy.”

    Secondly, dams saves energy. The United States is one of the largest procedures of hydropower in the world, second only Canada. Dams produce over 108,800 megawatts of renewable electricity and meet 8 to 12 percent of the nations power needs. Hydropower is considered clean because it does not contribute to global warming, air pollution, acid rain or ozone depletion. A manager, who work at dams, quotes “In the U.S, 39% of energy is being wasted each year and this becoming a problem day after day. And this absolutely is a disgrace. Did you know we can save over 5000 dollars.”

    Thirdly, dams help in irrigation. Presently, irrigated land covers about 277 million hectares i.e. about 18% of world’s arable land but is responsible for around 40% of crop output and employs nearly 30% of population spread over rural areas. With the large population growth expected for the next decades, irrigation must be expanded to increase the food capacity production. It is estimated that 80% of additional food production by the year 2025 will need to come from irrigated land.Ten percent of American cropland is irrigated using water stored behind dams. Thousands of jobs are tied to producing crops grown with irrigated water.

    Despite dams being beneficial, they have been known to affect the environment. Operating a hydropower can change the water’s temperature and the river’s flow, leading to harm native plants and sea creatures in the river. Because of dams, salmon must swim upstream to their spawning grounds to reproduce, but the series of dams get into their way. Dams also blocks fish migration, which some species completely separates spawning habitats. A researcher found out that in 2002, low flows below dams killed thousands of salmon on the Klamath.

    Moreover, dams affects climate change. Large dams are one of the single most important contributors to global warming, releasing 104 million metric tonnes of methane each year. 52,000 dams contribute more than 4% of the total warming impact of human impact. One year’s large dam methane emissions, have a global warming impact over 20 years equivalent to that of 7.5 billion tonnes of carbon dioxide. A scientist says “A growing number of scientific studies indicate that reservoirs, especially in the tropics, are a significant source of global greenhouse gas pollution.

    Lastly, dams have displayed people. Dams have displayed an estimated a 80 million people, with 23 million alone in China. Dams haves also negatively impacted about 500 million people living downstream. People who have been displayed have lost land, homes, irrigation schemes, food and water. Others have suffered from diseases dams bring.

    To conclude, I have researched about for and against points. However I personally believe that dams are not beneficial because dams have been killing fish, ruining the environment, releasing toxic chemical, forcing people to loose all their homes, as scientists say their are other simpler ways.

  26. Silver:
    These are the opinions which I can change and find alternatives for:
    1.Many dams built in the 20th century have proven to be river killers.
    In my opinion, I believe that dams have an extremely big and positive effect on biodiversity and ecosystem.In fact dams do not cause damage to the rivers ,their system and their structures because they help flood control and river navigation.
    2.Species live in flowing river than the standing lakes created by dams.
    Although dams are not good for different species of sea creatures, for example dams are not good for fish migration and may cause decline in the number of fish migrating, fish can live in dams.According to a website, I found out that fish can live in dams if the suitable food and healthy conditions are provided.Some dams have fertilisers to feed fish so they can survive.
    3.Dams, however, do have immense destructive impacts, but these are primarily of social nature: the forced physical and economic displacement of huge cumulative amounts of people to create rooms for dams and their reservoirs.
    I believe that dams, can cause no harm on many things like buildings, humans and biodiversity.This could happen by building dams in deserted areas and empty places.If this happens people and wildlife would be protected from risk and danger mean whilst dams can be built safely for the benefit of rivers.

  27. Gold challenge
    Are dams good?
    On our planet we have loads of dams but are they good or are they bad?Loads of people think rivers can affect and disturb our natural habitats even the animals but on the other hand people say it protects our rivers.Tropical and MULTI-tropical rivers or dams are extra hazardous to us but others who have said they protect rivers take no notice.

    Collin Thorne has said for the question about dams the short answer is a yes they do destroy rivers whereas loads of other people do not believe this statement and carry on with their on thoughts but later will realise because of their health conditions.

    Dams have been known to protect us from floods and prevents the loss of life on Earth.Dams controls rivers and make floods unlikely however it could be argued that dams block the migration and path of dams and could trap no kill them.

    Dams have good and bad advantages.🐠🐠🌊🌊🏝🏖🏞🗾

  28. Today’s discussion is, are dams good or bad?
    Dams have both positive and negative impact on our environment and eco system. The construction of Dam do cause damage to the rivers and effect the biodiversity but the amount of damage is related to how big the dam is and how it is build and managed.
    We live in Anthropocene world which is increasingly getting structured and influenced by human decisions. We have to take decision to make our life comfortable but at the same time do it in such a way that it has least possible damage on environment. Eg “the drought in the Horn of Africa was a disaster that cost the lives of millions, but the High Assam Dam spared Egypt from a drought that would have been truly catastrophic,”
    A poorly designed dam will have more negative effect which can be reduced by a properly managed dam. “Generally, large scale hydropower incurs excessive losses – whereas small or micro hydropower, sensitively installed and operated can offer very significant biodiversity and economic gains that could be vital at a local level.”
    Another major damage caused by the dams is the sedimentation problem, many rivers bring fine sediments from mountains and deliver it to farmlands which is vital for good yield of farming. This sedimentation benefit is reduced or removed post dam construction.
    Dams do have negative impact on river ecologies but they also bring irreplaceable benefits such as more irrigated agricultural land, clean energy and saves lives of millions by better flood control management.

  29. Bronze
    Opinion It is really sad that weather dams are killing the most wonderful city and the rivers .
    Opinion: the dams have proven to
    be river killers.
    Fact:Dams do change.

  30. bronze
    fact:most dams are not best practise
    opinion:
    The notion that some static measure of biodiversity is good and any change is bad is not substained by natural history.This is an opinion because it’s what he believes.
    fact:
    The ten least fragmented river systems found by the study were all located in developing countries. Five in South America, two in China and Africa and one in Southeast Asia.
    opinion:
    The benefits that hydroelectricity brings to communities – cheap, clean power, jobs, tax etcContrary to popular belief, hydroelectric power can seriously damage the climate.
    Many of the dams built during the 20th century have proven to be river killers. Examples are numerous and notorious.
    fact:
    Indeed dams do change the world and it’s natural environment.So do cities,roads,airports,chemical industries and agirculture. In general, we can say people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.

  31. Bronze
    Facts : Dams do change the world and its natural environment and so do cities , roads , airports , chemical industries and agriculture . In general ,we can say that people change their environment . The richer they are ,the more change they induce. In the course of that ,they often destroy species;they also create species ,but that is not often measured or mentioned.

    Opinions
    The benefits that hydroelectricity brings to communities – cheap ,clean ,power ,jobs , tax etc – outweigh ecological and social damage done. Many of the dams built during the 20th century have proven to be river killers. Examples are numerous and notorious. Contrary to popular belief ,hydroelectric power can seriously damage the climate .

  32. BRONZE
    Opinions
    The good news is that nature is not only more vulnerable to dams than was realised, it’s also more resilient than we thought. So maybe the destruction of a river by damming it isn’t terminal.
    “Indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.
    THIS is an opinions because it is the perspective of Mike Muller

    Silver
    Dams don’t damage climate they are perfectly harmless,they are just used for people to get down the road and stop water coming into people’s houses and this is false information
    Many dams are not killer rivers most animals die from eating plastic bags and it is not our fault that animals don’t know what anything is, they should have some sense.

    Gold:
    ARE DAMS GOOD ?
    Dams have advantages and disadvantages on our planet.But are they helpful? Some people believe dams are effecting nature and animals however some people think dams are good as they are protecting us and the rivers.
    First of all dams have been known to protect us from floods and prevent the loss of life on Earth.Dams control rivers and make floods more unlikely.However it could be argued that dams block the migration of fish and kill them as they swim into the dams as some times the water is cleaned or sent to different places.
    A group of scientists have said hydropower is one of the main uses for dams and less than 3 percent of existing dams produce hydroelectricity. Hydropower is the largest source of renewable electricity in the U.S. In addition to providing baseload and peaking power hydropower projects also keep electrical transmission systems working smoothly.But on the on the other hand a group of people have said more than a 1000 dams in the u.s.a have collapsed or have been removed.When dams are not properly built or maintained they can break. In the world’s biggest dam disaster, the failure of China’s Banqiao Dam killed an estimated 171,000 people in 1975.

  33. Bronze challenge
    Opinions
    Indeed dams do change the world and it’s agriculture.In general we can say that people change their environment.I know this is an opinion because it’s saying what he thinks.The richer they are , the more change they include.
    Fact: In the course of that they often destroy species ,but that is often measured or mentioned. I know that this is a fact because it is known and proved to be true.
    Opinion
    The notion that some static measure of biodiversity is good and any change is bad is not substained by natural history.This is an opinion because it’s what he believes.

  34. bronse
    fact.The notion that some static measure of biodiversity is good and any change is bad is not substantiated by natural history. As an example, sedimentation as a process is the base of geology, many millennia old, many thousands of metres deep
    i know this because it said fact
    oppinion
    indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they inducen

  35. Bronze:
    The article has listed a number of facts and opinions about dams and their role in damaging rivers. Some of the facts and opinions were for dams while others were against the whole idea of building dams. The following are the key facts and opinions I found in the article:
    Opinions
    1.Indeed, dams do change the world and it’s natural environment.
    2.Ultimately dams change rivers.The degree to which they change and the negative impacts on humans and nature depend on how large they are, how they are built and managed and where they are located.
    3.Many of the dams built in the 20th century have proven to be river killers
    4.The richer they are, the more change they induce.
    Facts
    1.The ten least fragmented river systems found by the study were all located in developing countries.Five in South America,two in China and Africa and one in Southeast Asia.
    2.The drought in the Horn of Africa was a disaster that cost the lives of millions.

  36. Bronze

    opinions
    Indeed dams do change the world and it’s agriculture.In general we can say that people change their environment.I know this is an opinion because it’s saying what he thinks.The richer they are , the more change they include.
    Fact: In the course of that they often destroy species ,but that is often measured or mentioned. I know that this is a fact because it is known and proved to be true.
    Opinion
    The notion that some static measure of biodiversity is good and any change is bad is not substained by natural history.This is an opinion because it’s what he believes.

  37. Gold:
    ARE DAMS GOOD ?
    Dams have advantages and disadvantages on our planet.But are they helpful? Some people believe dams are effecting nature and animals however some people think dams are good as they are protecting us and the rivers.

    First of all dams have been known to protect us from floods and prevent the loss of life on Earth.Dams control rivers and make floods more unlikely.However it could be argued that dams block the migration of fish and kill them as they swim into the dams as some times the water is cleaned or sent to different places.

    A group of scientists have said hydropower is one of the main uses for dams and less than 3 percent of existing dams produce hydroelectricity. Hydropower is the largest source of renewable electricity in the U.S. In addition to providing baseload and peaking power hydropower projects also keep electrical transmission systems working smoothly.But on the on the other hand a group of people have said more than a 1000 dams in the u.s.a have collapsed or have been removed.When dams are not properly built or maintained they can break. In the world’s biggest dam disaster, the failure of China’s Banqiao Dam killed an estimated 171,000 people in 1975.

    People from jobs like fire men or farmers have said dams create reservoirs throughout the United States that supply water for many uses, including industrial, municipal, and agricultural.

    So I think we should only keep dams in places that we need them like places that are mainly flooded or places with wild rivers or we should change dams and make them more safe because I strongly believe dams have a bad impact on the planet.

  38. bronze
    fact: the rams are effecting the enivrioment that is really sad.
    opinion : I think it is really bad if you effect it that is really bad.
    fact: if you effect the eniviroment you effecting other animals

  39. BRONZE

    Opinions

    The good news is that nature is not only more vulnerable to dams than was realised, it’s also more resilient than we thought. So maybe the destruction of a river by damming it isn’t terminal.

    “Indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.

    THIS is an opinions because it is the perspective of Mike Muller

  40. BRONZE
    __________________________________________________________________
    Facts: Indeed dams do change the world and it’s natural environment.So do cities,roads,airports,chemical industries and agirculture. In general, we can say people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.The ten least fragmented river systems found by the study were all located in developing countries. Five in South America, two in China and Africa and one in South East Asia
    __________________________________________________________________
    Opinions:
    The benefits of hydroelectricity brings to communities- cheap, clean power,jobs,tax etc. contrary to popular belief, hydroelectric power can seriously damage the climate. Most of the dams built in the 20th century have proven to be river killers. Examples are numerous and notorious.

  41. Bronze
    Facts:Indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.The ten least fragmented river systems found by the study were all located in developing countries. Five in South America, two in China and Africa and one in Southeast Asia.

    Opinions:
    The benefits that hydroelectricity brings to communities – cheap, clean power, jobs, tax etcContrary to popular belief, hydroelectric power can seriously damage the climate.
    Many of the dams built during the 20th century have proven to be river killers. Examples are numerous and notorious.

    Silver
    Dams don’t damage climate they are perfectly harmless,they are just used for people to get down the road and stop water coming into people’s houses and this is false information

    Many dams are not killer rivers most animals die from eating plastic bags and it is not our fault that animals don’t know what anything is, they should have some sense.

  42. BRONZE

    Fact
    The ten least fragmented river systems found by the study were all located in developing countries. Five in South America, two in China and Africa and one in Southeast Asia.

    Indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.

    the drought in the Horn of Africa was a disaster that cost the lives of millions.

    Opinions

    Many of the dams built during the 20th century have proven to be river killers. Examples are numerous and notorious.

    the benefits that hydroelectricity brings to communities – cheap, clean power, jobs, tax etc

    Contrary to popular belief, hydroelectric power can seriously damage the climate.

  43. Bronze
    Opinions
    Indeed, dams do change the world and its natural environment. So do cities, roads, airports, chemical industries and agriculture. In general, we can say that people change their environment. The richer they are, the more change they induce. In the course of that, they often destroy species; they also create species, but that is not often measured or mentioned.The notion that some static measure of biodiversity is good and any change is bad is not substantiated by natural history. As an example, sedimentation as a process is the base of geology, many millennia old, many thousands of metres deep.So the IRN’s latest database is simply that:- a collection of data (of variable quality) with no inherent information about whether what is happening is good or bad.What we need to take from this debate is the realisation that we now live in an anthropocene world, whose form is increasingly structured and sustained through human decision. We can take deliberate decisions about what kind of world we want to live in.
    But that WE is not a small group of North American environmentalists and their friends. It is local and larger communities, taking decisions through their own institutions at different levels and not trying to impose their value sets on others.

    I know this is an opinion as it says perspective from Mike Muller and perspective means a point of view if it was a fact it wouldn’t say perspective.

    Fact
    Most dams are not best practice

    I know this is a fact because at the start it said fact.

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