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may 17, 2018 - CO2 ppm reached 411.24 in May 2018; May 1998 it was 369.42
Added to timeline:
2010s Environmental Timeline
By
Victor V. Motti
30 Dec 2019
0
0
1158
Date:
may 17, 2018
Now
~ 8 years and 4 months ago
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