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Posted Tue Jan 13 2015: from Scientific American:
2015 Begins with CO2 above 400 PPM Mark http://apocadocs.com/s.pl?1421127916
The new year has only just begun, but we've already recorded our first days with average carbon dioxide levels above 400 parts per million, potentially leading to many months in a row above this threshold, experts say. The Scripps Institution of Oceanography records of atmospheric carbon dioxide levels show that Jan. 1 was the first day of the new year above that concentration, followed by Jan. 3 and Jan. 7. Daily averages have continued at this level or higher through Jan. 9, though they could continue to dance up and down around that mark due to day-to-day variations caused by weather systems. But even with those fluctuations, 2015 will likely see many months above 400 ppm, possibly starting with the very first month of the year.
[Read more stories about: carbon emissions, economic myopia, ecosystem interrelationships]

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'Doc Jim says:
I'm pretty sure that 400 ppm was a Wild-Assed Guess (WAG), and so isn't really anything to fear, much, really.

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