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Largest ever spike in CO2 emissions

Photo: Atmospheric CO2 at Mauna Loa Observatory, Hawaii. SourceNOAA

Atmospheric carbon dioxide concentrations grew at their fastest level in 2015, increasing by 3.05 parts per million (ppm) compared with the previous year. 

The measurements were taken from NOAA’s Mauna Loa observatory, based in Hawaii, with detailed records for the last 56 years. 2015 is now the fourth consecutive year where carbon dioxide concentration has exceed 2ppm.