Some of the papers Dr. James E. Hansen published on global warming heightened my awareness of the problem we, as a society, face.
The IEA in the WEO 2009 suggests that we should make an effort to stabilize atmospheric CO2 at 450ppm by 2030.This morning, when I browsed Jim Hansen's web-page I found a descending view. Hansen in an October presentation to the "Club of Rome Global Assembly 2009" suggests a safe Level of CO2 is <350ppm.
Since IMO is addressing GHG emissions, I thought Hansen's speech might be of interest.
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