402 ppm

On May 2013, atmospheric concentrations of CO2 near the summit of Mount Loa in Hawai'i exceeded 400 ppm. (ppm stands for parts per million)

Photo 4-8-2014, 5 18 51 PM.jpg

Over the last few days, measurements of 402 ppm have been recorded.

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For more, read Andrew Freedman’s post here



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