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protecting public health than it was about limiting climate change. But the effect would have been to limit further fossil fuel extraction in the state. The implication of faster ocean warming is that the effect of carbon dioxide on global warming is greater than we’d thought. We already knew that adding CO2 to the air was warming the world very rapidly. And the IPCC just warned in a special report that limiting global warming to 1.5 degrees Celsius 2.7 degrees Fahrenheit above preindustrial levels – a target that would avert many extreme impacts on humans and ecosystems – would require quickly reducing and eventually eliminating coal, oil and gas from the world energy supply. This study doesn’t change any of that, but it means we will need to eliminate fossil fuels even faster. The solid line shows this optimistic scenario where coal use is replaced first, then oil, and finally natural gas with wind and solar and other nonfossil fuel energy sources ramping up as fast as is feasible. Note that 23 of fossil fuel energy produces waste heat, so with wind and solar only about 13 of primary energy is needed, more heat pumps 31 air and 61 ground can also reduce energy use, as well as better sealed and insulated builldings, more passive solar, more awnings .
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