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With the world’s progress toward reducing carbon emissions fitful at best, people are slowly waking up to the possibility of not meeting international targets and staring instead at potential worst-case scenarios. Enter geoengineering, in which we deliberately manipulate the Earth’s climate system to stave off planetary ruin. Is artificially reflecting sunlight away from the planet or sucking carbon dioxide from the atmosphere our last, best hope, or is it a reckless distraction from ongoing climate mitigation efforts? Joe and Mark review the forms of geoengineering under consideration, how feasible they are, and whether they’d do more harm than good.
