Starting Later This Year, 400 and Up is Likely to Be the New Normal for CO2 Measurements by ANDREW C. REVKIN

By ANDREW C. REVKIN

Climate scientists predict that the combination of El Niño impacts and rising emissions will cause atmospheric levels of heat-trapping CO2 to cross a threshold that won’t be revisited for a very long time.

Published: October 22, 2015 at 11:24AM

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