CO2 in the Atmosphere Climbs to Highest Level in 4.5 Million Years

The last time the CO2 concentration was at this level, seas were almost 80 feet higher than today.

ImaGeo iconImaGeo
By Tom Yulsman
Jun 7, 2021 8:45 PMJun 7, 2021 8:52 PM
The Atmosphere
A view from the International Space Station in 2003 highlights just how thin our atmosphere really is. (Credit: NASA)

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Carbon dioxide in our atmosphere reached it's annual peak in May, topping out at the highest level ever directly measured since modern observations began 63 years ago.

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