Girl Planting seeds

How animal waste is helping turn China's lakes green

Animal husbandry is contaminating China’s water and has been linked to turning lakes bright green, a phenomenon known as eutrophication.  Eutrophication plagues areas around the world where rapid urbanisation and agricultural growth has taken place near bodies of water. When it rains, chemicals from cities, factories and fertilisers or untreated animal waste on farms can wash into lakes, streams and rivers. The extra nutrients feed algae on the surface of the water that can proliferate enough to block light. This deprives organisms of the light they need to photosynthesise. In the UK, for example, Tamar Lakes in south-western England suffered intense eutrophication pollution between 1975 and the 2000s, and the phenomena is also widespread in estuaries and coastal areas in the US.  Read more...



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