Blah, blah, blah: Without offering one shred of convincing evidence, warmist Revkin again suggests that a 600 ppm CO2 world is riskier than a 300 ppm CO2 world

On the Climate High End, Methane Time Bombs and the Lure of the New - NYTimes.com

the picture of growing risk from rising levels of greenhouse gases is best delineated by decades of work that is old and not contentious