What does James Hansen conclude?
James Hansen, director of the NASA Goddard Institute for Space Studies, is one of the leading researchers on climate change. His paper uses reserves for oil, gas and coal based on data from the U.S. Energy Information Administration, a department of the U.S. Department of Energy. Using those numbers, his conclusion is that “if estimates of oil and gas reserves by the Energy Information Administration are realistic, it is feasible to keep atmospheric CO2 from exceeding approximately 450 ppm, provided that future exploitation of the vast reservoirs of coal and unconventional fossil fuels incorporates carbon capture and sequestration.” Note that many expert observers believe that the EIA numbers are actually not realistic — that actual oil and coal reserves are far lower than the official numbers. The International Energy Agency recently agreed (Oct 2007) and is no longer going to use those numbers (which were sourced from the United States Geological Survey). They will release revised nu
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