Heat-trapping carbon dioxide levels in air hit another high
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June 8, 2018
WASHINGTON (AP) — The amount of heat-trapping carbon dioxide in the air peaked again this year at record levels, scientists reported Thursday.
The National Oceanic and Atmospheric Administration said Thursday that carbon dioxide levels averaged 411.25 parts per million in May at the federal Mauna Loa observatory in Hawaii, up from 409.65 a year ago.
The Scripps Institution for Oceanography, where scientists first started tracking the gas, found a similar increase.
May is traditionally the highest month for carbon dioxide levels; in late spring and summer, plants suck the heat-trapping gas out...
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