While most of the world fixates on how to reduce the amount of carbon dioxide (CO_2) and other greenhouse gases we emit into the atmosphere, scientists and engineers are busy working on various "geo-engineering" technologies-many of which are highly theoretical-to mitigate global warming. One of the theories proposed for reducing global warming involves deflecting heat away from the earth's surface with solar shields or satellites with movable reflectors. Computer models suggest that blocking 8% of the sun's Earth-bound radiation would effectively counteract the warming effect of our CO_2 pollution.
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