U.S. report contradicts Trump team: Warming mostly man-made.
"...This period is now the warmest in the history of modern civilization. For the first time, scientists highlighted a dozen 'tipping points' of potential dangers that could happen from warming...they include the slowing down of the giant Atlantic Ocean circulation system that could dramatically warp weather world-wide, much stronger El Niño's, major decreases in ice sheets in Greenland and Antarctica, which would spike sea level rise, and massive release of methane and carbon dioxide from thawing permafrost that could turbo-charge warming..."
One who knows.
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