Record CO2 levels means humanity is in uncharted territory

A media release from The Climate Institute alerts that humanity entered uncharted territory on Saturday 11 May, as the concentration of the heat-trapping greenhouse gas carbon dioxide in the atmosphere hit a record daily average high of 400 parts per million (ppm). “The atmosphere hasn’t seen CO2 this high for hundreds of thousands, if not millions, of years. We are in dangerous and uncharted territory, with little time to ensure a safe and sustainable future,” said John Connor, CEO of The Climate Institute. The 400 ppm mark was measured at Hawaii’s Mauna Loa observatory by the University of California – San Diego, which has tracked northern hemisphere levels of CO2 since 1958.

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