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Last Updated: Feb 28, 2009 - 9:47:35 AM |
Posted in:
Climate Change
Target Atmospheric CO2: Where Should Humanity Aim? -
Jun 17, 2008 - 8:26:19 AM
Jim Hansen et al recently (April 2008) produced a paper, which has been submitted to Nature, which says that if humanity wishes to preserve a planet similar to that on which civilization developed and to which life on Earth is adapted, paleoclimate evidence and ongoing climate change suggests that CO2 levels will need to be reduced from its current 385 ppm to at most 350 ppm.