The average daily level of heat-trapping C02 in the atmosphere has passed the 400 parts per million milestone for the first time in human history, according to the National Oceanic and Atmospheric Administration.
“It symbolizes that so far we have failed miserably in tackling this problem,” commented Pieter P. Tans, who oversees the NOAA monitoring program.
If we continue to burn fossil fuels at rapidly increasing rates, we will cross the feared 450 parts per million limit in as little as two decades. At those levels, there will be catastrophic and irreversible changes to the planet’s climate.
As Bill McKibben says, “The only question now is whether the relentless rise in carbon can be matched by a…
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