Life Support Systems on Earth Failing
By some estimates, 12,000 species go extinct every year, and the rate is accelerating. Akin to a cataclysmic asteroid, pollution, logging, over-exploitation, consumption, land use changes and engineering projects have produced the planet's sixth great extinction of species.
Freshwater ecosystems may be the first collapse of one of Earth's life support systems in 13,000 years. Species that live in lakes and rivers are vanishing four to six times faster than anywhere else on the planet, said Klement Tockner of the Leibniz-Institute of Freshwater Ecology and Inland Fisheries in Germany.
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