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Study acquits sun of climate change
The sun's energy output has barely varied over the past 1,000 years, raising chances that global warming has human rather than celestial causes, a study showed on Wednesday.
Researchers from Germany, Switzerland and the United States found that the sun's brightness varied by only 0.07 percent over 11-year sunspot cycles, far too little to account for the rise in temperatures since the Industrial Revolution.
Website: http://www.cnn.com/2006/TECH/science/09/15/global.warming.sun.reut/index.html
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