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While much has been made of record-breaking thermometer readings and “unprecedented” heat waves, the average global temperature has risen by just 1°F in the past hundred years. If this doesn’t seem like much, well, it isn’t and, moreover, it has been unevenly distributed: temperatures rose from 1920-1940, decreased for the next thirty years, increased again until the mid-1990s, and have been nearly flat since 1998.
This is not the result one would expect if human-generated greenhouse gas emissions, which have constantly increased, inevitably caused temperatures to rise.
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