CO2 Surpasses 420 Parts Per Million for First Time

HeadlineApr 07, 2021

In climate news, the concentration of carbon dioxide in the atmosphere surpassed 420 parts per million for the first time in recorded history. The measurement puts the planet roughly at the halfway point on the path to doubling preindustrial CO2 levels. The reading was taken at the Mauna Loa Observatory on the Big Island of Hawaii this past weekend.

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