sobering milestone
John Miedema
Sigh….
http://www.commondreams.org/headline/2013/04/29-2
The world is likely days away from a "sobering milestone" in our planetary history.
Concentrations of the greenhouse gas carbon dioxide will likely reach 400 parts per million (ppm) for first time in human history, say scientists at the Scripps Institution of Oceanography, and unless drastic action is taken, we're on track to hit 450 ppm in the near future.
"I wish it weren't true, but it looks like the world is going to blow through the 400-ppm level without losing a beat," said Scripps geochemist Ralph Keeling, whose father Charles David (Dave) Keeling began the "Keeling Curve" to track daily CO2 levels recorded at Mauna Loa Observatory.
John Miedema
BioLogical Carbon, LLC
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