None of the scientists in the room so much as blinked when David Keith suggested saving the world with spy planes spraying sulfuric acid.
ENGINEERING A COOLER EARTH Giant air-capture machines, like artificial trees, could cleanse the atmosphere of excess carbon dioxide. Michael MorgensternCOOL BUT DIFFERENTFIVE WAYS TO SAVE THE PLANET | The United Kingdom’s Royal Society has rated geoengineering techniques according to cost, effectiveness (cooling power) and timeliness (considering both how quickly a technology could be deployed and how fast it would cause cooling).
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