A new study by NASA climatologists finds that the world's temperature is reaching a level that has not been seen in thousands of years.

Noting that "that this critical ocean region [Western Pacific], and probably the planet as a whole, is approximately as warm now as at the Holocene maximum and within. ~1°C of the maximum temperature of the past million years," they conclude that additional global warming of more than 1° C relative to 2000 "will constitute dangerous climate change as judged from likely effects on sea level and extermination of species."

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