Several research teams have produced models that show significant losses of rainfall as a result of SRM and other sunlight-reflecting geoengineering methods. One 2012 study shows a 20 percent reduction in rainfall in some areas of the Amazon after a particularly extreme use of SRM. When another team modeled spraying sulfur from points in the Northern Hemisphere for a 2013 study, the results projected a staggering 60–100 percent drop in a key measure of plant productivity in the African countries of the Sahel (Burkina Faso, Chad, Mali, Niger, Senegal, and Sudan)—that means, potentially, a
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