Earth Just Permanently Passed Climate Threshold

EcoWatch
Sep 29, 2016, 8:54 am162 pts
Carbon dioxide concentration in the atmosphere stayed above 400 parts per million (ppm) during September—a time when CO2 levels typically hit the yearly low—raising fears that the planet has reached a point of no return . A sunset over the Arctic during a NOAA Climate Program expedition north of Russia.…

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