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Antarctica Reaches Symbolic Carbon Dioxide Level

For the first time in 4 million years, Antarctica registered carbon dioxide levels over the symbolic threshold of 400 parts per million, according to the National Oceanic and Atmospheric Administration (NOAA), the U.S. government agency responsible for monitoring conditions of the oceans and atmosphere. Scientists at NOAA say the South Pole “has shown the same, relentless upward trend in CO2 as the rest of world,” but that it took longer for it to register. “The far southern hemisphere...

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