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To combat global warming, scientists in Scotland now suggest an out-of-this-world solution -- a giant dust cloud in space, blasted off an asteroid, which would act like a sunshade for Earth.
The researchers suggest outfitting a near-Earth asteroid with a "mass driver," a device consisting of electromagnets that would hurl asteroid-derived matter away from the giant rock. The mass driver could serve both as a rocket to push the asteroid to the L1 point and as an engine to spew out sun-shielding dust.
The researchers calculate that the largest near-Earth asteroid, 1036 Ganymed, could maintain a dust cloud large enough to block out 6.58 percent of the solar radiation that would normally reach Earth, more than enough to combat any current global warming trends. ....... An asteroid of this size might make one think of disaster movies, such as "Armageddon"; however, "rather than destroying the Earth, it could be used to help mankind," Bewick said.
Originally posted by magma
I could imagine that the cost would be prohibitive to actually do such a thing.
Good idea though