Gap Fill - Paragraph One

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Paragraph 1

A study shows that 86 per cent of the world's rivers have been damaged by human . The study was conducted by researchers from a university in Toulouse, France. They examined on over 2,500 rivers around the world. They did not look at rivers in the regions of the Arctic and Antarctica or in . The scientists looked into changes to over the past 200 years. They discovered that biodiversity in over of rivers has been damaged by humans. The researchers said there were many reasons for damage. A big reason is the of new species of fish into rivers. Other reasons include pollution, dams, overfishing, farming and climate change.

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