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'Dirty skies may shield against warming'

Breaking Earth News: Global Warming/Conference on Climate Change

Nov 17, 2006

NAIROBI: If the sun warms the Earth too dangerously, the time may come to draw the shade. The "shade" would be a layer of pollution deliberately spewed into the atmosphere to help cool the planet. The proposal comes from prominent scientists, among them a Nobel laureate. The reaction here at the annual UN conference on climate change is a mix of caution, curiosity and some resignation to such "massive and drastic"operations, as the chief UN climatologist describes them.The Nobel Prize-winning scientist who first made the proposal is himself "not enthusiastic about it". "It was meant to startle the policymakers,"said Paul J Crutzen, of Germany's Max Planck Institute for Chemistry. "If they don't take action much more strongly than they have in the past, then in the end we have to do experiments like this." Serious people are taking Crutzen's idea seriously. This weekend at Moffett Field, California, Nasa's Ames Research Centre hosts a closed-door, high-level workshop on the global haze proposal and other "geoengineering"ideas for fending off climate change.

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