What has become clear is that if society wants to avoid future disasters, it should do two things ? prevent even greater disruption to the climate system and prepare for the climate changes already set...

The dialogue is now shifting gears from climate science to climate action. There’s still a lot we need to learn about the science, but the events of the past year have ended much of the...

Jon is widely admired and respected by the best scientists. His models and analyses are innovative and credible. He is tackling some of the toughest issues of climate change.

The evidence is overwhelming that even simple changes can be a big help and have a huge cumulative impact. If every American switched just three light bulbs to compact fluorescent bulbs, it would be the...

The bottom line is that the scientific evidence from 2005 and early 2006 is powerful and conclusive. If society wishes to avoid catastrophic disruption of our lives, the time for action is now. Individual citizens...