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June 9, 2021 03:30 am
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/x0dfK45aysM/carbon-dioxide-reaches-highest-level-in-4-million-years
Carbon Dioxide Reaches Highest Level In 4 Million Years
An anonymous reader quotes a report from NPR: The amount of carbon dioxide in Earth's atmosphere reached 419 parts per million in May, its highest level in more than four million years, the National Oceanic and Atmospheric Administration announced on Monday. After dipping last year because of pandemic-fueled lockdowns, emissions of greenhouse gases have begun to soar again as economies open and people resume work and travel. The newly released data about May carbon dioxide levels show that the global community so far has failed to slow the accumulation of heat-trapping gases in the atmosphere, NOAA said in its announcement. The May measurement is the monthly average of atmospheric data recorded by NOAA and the Scripps Institution of Oceanography at an observatory atop Hawaii's Mauna Loa volcano. NOAA's monthly average from its measurements came to 419.13 parts per million, and scientists from Scripps calculated their average as 418.92. A year ago, the average was 417 parts per million. The last time the atmosphere held similar amounts of carbon dioxide was during the Pliocene period, NOAA said, about 4.1 to 4.5 million years ago. At that time, sea levels were 78 feet higher. The planet was an average of 7 degrees Fahrenheit warmer, and large forests might have grown in what is today's Arctic tundra. "We are adding roughly 40 billion metric tons of CO2 pollution to the atmosphere per year," said Pieter Tans, a senior scientist with NOAA's Global Monitoring Laboratory, in a statement. "If we want to avoid catastrophic climate change, the highest priority must be to reduce CO2 pollution to zero at the earliest possible date."Read more of this story at Slashdot.
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/x0dfK45aysM/carbon-dioxide-reaches-highest-level-in-4-million-years
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