The U.N.'s climate change panel reports that, by 2050, 80 percent of the world's energy could come from renewables. The panel also issued this reassuring news: As long as we fulfill the most ambitious of renewable build-out plans and cut one-third of greenhouse gas, it is possible to keep the planet from nosediving into life-altering, irreversible climate change. So, no pressure. For starters, you could seriously just turn the effing A/C down. America's working on that whole clean energy thing, President Obama said this weekend. But China's getting there faster, surprise surprise. Japan wants to shut down another vulnerable nuclear …
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