(WASHINGTON POST) — An international body of nearly 100 climate scientists convened by the United Nations have issued a stern warning to the rest of the world.

Unless governments around the globe undertake “unprecedented” action to reverse it, Earth’s temperatures will soar upwards of 1.5-degrees Celsius, or 2.7 degrees Fahrenheit, over preindustrial levels by the end of the century.

Warming above that threshold, the scientists write, could trigger the near-total loss of the world’s tropical coral reefs and the collapse of ice sheets in Antarctica and Greenland that would send sea levels soaring.

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