It's called solar geoengineering, and it's an idea being researched right now. If we can't blunt the impact of global warming with the measures available to us, eventually time will run short and humanity will need to take drastic action.
By preventing some of the sun's heat from reaching the earth, we could attempt to cool the planet down. Would it work? Possibly! Could it backfire enormously, leading to massive crop die-off? Also possibly!
GUEST: Climate reporter Bob Berwyn, for Inside Climate News
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