Tag Archives: NOAA

Global carbon dioxide levels break 400ppm milestone

by Adam Vaughan, The Guardian, 6 May 2015 11.54 EDT

Record carbon dioxide (CO2) concentrations in the atmosphere were reported worldwide in March, in what scientists said marked a significant milestone for global warming.

Figures released by the US science agency Noaa on Wednesday show that for the first time since records began, the parts per million (ppm) of CO2 in the atmosphere were over 400 globally for a month….

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