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Posted Fri Aug 7 2009: from BBC (UK):
Climate fixes 'pose drought risk'
The use of geo-engineering to slow global warming may increase the risk of drought, according to a paper in Science journal. Methods put forward include reflecting solar radiation back into space using giant mirrors or aerosol particles. But the authors warn that such attempts to control the climate could also cause major changes in precipitation. They want the effect on rainfall to be assessed before any action is taken.... They cite the powerful effects on rainfall of volcanic eruptions which also prevent solar radiation reaching the Earth's surface, albeit by throwing up dust rather than reflecting the radiation back into space. For example in 1991, the eruption of Mount Pinatubo not only reduced global temperatures but also led to increases in drought.... The article warns that geo-engineering of this type, combined with the effects of global warming could produce reductions in regional rainfall that could rival those of past major droughts, leading to winners and losers among the human population and possible conflicts over water.
[Read more stories about: unintended consequences, geoengineering, water issues]
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'Doc Michael says:
Why don't all these crises recognize that we need to be able to fix them?

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