Global Carbon Dioxide Hits a Significant Milestone

The Guardian: “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 … The current concentrations are unprecedented in millions of years.”

“’This marks the fact that humans burning fossil fuels have caused global carbon dioxide concentrations to rise more than 120ppm since pre-industrial times,’ [said Pieter Tans, lead scientist on NOAA’s greenhouse gas network]. ‘Half of that rise has occurred since 1980.’”

“Noaa used air samples taken from 40 sites worldwide, and analysed them at its centre in Boulder, Colorado. The agency added that the average growth rate in concentrations was 2.25ppm per year from 2012-2014, the highest ever recorded for three consecutive years.”

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