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CSIROscope

#Atmospheric science

Why there’s more greenhouse gas in the atmosphere than you may have realised

This week brought news that atmospheric carbon dioxide (CO₂) levels at the Mauna Loa atmospheric observatory in Hawaii have risen steeply for the seventh year in a row, reaching a May 2019 average of 414.7 parts per million (ppm). But in truth, the amount of greenhouse gas in our atmosphere is higher still.

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