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IPCC: More Than All of Observed Warming Has Been Caused by Humanity’s Emissions

First published on April 24, 2015. “The best estimate of the human-induced contribution to warming is similar to the observed warming [from 1951 through 2010].” IPCC 2013, Summary for Policy Makers.(1) This statement differs radically from the almost ubiquitous understanding that part of global warming has been caused by humanity and part is natural. In reality however, humanity’s excess greenhouse gas emissions have caused about 35 percent more than all of the observed warming and our climate is naturally cooling – there is no natural warming. Therein lies the rub. How can the human-induced contribution be similar to observed warming if more than all of the warming has been caused by humanity?

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