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sggatecl
Senior Member
CO2 in the atmosphere just exceeded 415 parts per million for the first time in human history.
For the first time in human history ? not recorded history, but since humans have existed on Earth ? carbon dioxide in the atmosphere has topped 415 parts per million, reaching 415.26 parts per million, according to sensors at the Mauna Loa Observatory, a research outpost of the National Oceanic and Atmospheric Agency.