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Posted Thu Aug 9 2012: from Live Science:
Could Space Mirrors Stop Global Warming?
The record-breaking temperatures of the past few years are getting more people thinking about bigger solutions to climate change. Ideas once thought of as wacky are now receiving careful consideration, including an idea that sounds straight out of science fiction: cooling the earth by launching reflective mirrors into space. Lowell Wood of Lawrence Livermore National Laboratory proposed a giant space mirror in the early 2000s, though he cautioned that the mirror should be considered only as a measure of last resort. Why? Because the mirror would have to have an area of 600,000 square miles - a slightly smaller area than Greenland - and launching something that big would be prohibitively expensive. Another option: billions of smaller mirrors. Roger Angel, researcher and optics expert at the University of Arizona, proposed that idea in 2006.
[Read more stories about: geoengineering, global warming]
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