CO2 Levels Have Crossed 400 ppm Threshold Far Earlier This Year

Yale e360
By Yale Environment 360Mar 19, 2014, 12:40 pm36 pts
Concentrations of carbon dioxide in the atmosphere have reached the 400 parts per million threshold two months earlier this year than last, an indication that the planet will soon experience the 400 ppm level year-round, according to scientists from the Scripps Institute of Oceanography. Last year was the first…

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