Assuming half of past warming is due to man's CO2 is not enough to support catastrophic forecasts. (climate-skeptic.com)
John P. Holdren, the science adviser to the president, has sometimes been attacked for signing on to catastrophic forecasts of population - driven doom as a young researcher. (dotearth.blogs.nytimes.com)
The world has indeed warmed over the last century, but not enough to be consistent with catastrophic forecasts, and not all due to CO2 (climate-skeptic.com)