March 24, 2014 | David

The underwater world fascinates me. What life lies beneath the surface of a river or ocean? And what invisible changes are people causing in those systems?

A new study predicts drier summers and wetter winters will cause more agricultural fertiliser to be washed into the UK's rivers. Fertiliser pollution upsets the biological balance of a river and can encourage the growth of toxic algae.

Growing food is essential, but I worry that climate change will make farming even more damaging to our rivers.

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River Flood

Fertilisers washed into rivers cause problems all the way into oceans.

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Image: Flickr/Terran Brown

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