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Answer on human-caused climate change is in

Sacramento Bee: As our planet warms, scientists and the general public are increasingly asking if human-caused climate change influences the extreme weather events we see all around us. Until recently, the answer was always “we don’t know yet.” Today, the answer is increasingly “yes.” Earth is in a remarkable transition from a world in which human influence on climate has been negligible to one in which our influence is increasingly dominant. One of the most active research areas in the climate sciences is the...