Man-made climate change may need man-made remedies, science panel says

February 11, 2015 3:26 AM

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Alarmed by the rapid pace of climate change, a key federal science panel is urging a major research effort into high-tech schemes that could cool the planet if prevention fails, potentially including giant machines to suck greenhouse gases from the air, aerosol sprays shot into the atmosphere to reflect sunlight back into space, and fertilizers for the ocean to boost growth of carbon-hungry plants.

Technologies to dial down the planet’s thermostat have long been considered a sideshow in the debate over global warming, largely dismissed by scientists as unworkable and potentially dangerous. But a comprehensive study released Tuesday by the National Research Council, the government’s main scient...

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