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To Fix Climate Change, Scientists Turn To Hacking The Earth

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If Earth overheats, can it be artificially cooled? Should the effort begin now? Who would decide? The very idea of "geoengineering," and the unknown risks of tweaking our climate, leaves many scientists with more questions than answers. (AP Photo/Courtesy of NASA)
If Earth overheats, can it be artificially cooled? Should the effort begin now? Who would decide? The very idea of "geoengineering," and the unknown risks of tweaking our climate, leaves many scientists with more questions than answers. (AP Photo/Courtesy of NASA)

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