We've already thoroughly debunked geoengineering strategies like launching mirrors into space, seeding the oceans with extra iron, and loading the atmosphere with ray-repelling aerosols. But this idea, posed by a scientist last week at the annual meeting of the American Geophysical Union, though still a long shot, is actually pretty ingenious. Alfred Wong, a plasma physicist at UCLA, says that we might be able to use Earth's natural magnetic field as a giant conveyor belt to catapult excess carbon dioxide into outer space. The CO2 must be ionized first, which Dr. Wong proposes could be done with lasers (generating less …
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