Gap Fill - Rivers - Level 2


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   biodiversity      climate      data      fish      half      reasons      rivers      scientists      study      university  

Paragraph 1

A shows that humans have damaged 86 per cent of the world's . The study is from a in France. Researchers examined on over 2,500 of the world's rivers. They did not look at rivers in the Arctic and Antarctica or in deserts. The looked at changes to over the past 200 years. Biodiversity in over of rivers has been seriously damaged by humans. There are many for this damage. A big reason is the new species of that are in rivers. Other reasons include pollution, dams, overfishing, farming and change.

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