I have a personal staff that helps me scour the internet and other media for the latest scientific peer-reviewed findings, the latest examples of climate-related extreme weather events, and the latest examples of progress. The world is in the midst of a sustainability revolution that has the scope of the industrial revolution, but with the speed of the digital revolution. That's not enough without new laws and the right kind of political leadership. But it does give us a base from which to build a movement that will save us from the most catastrophic consequences of the climate crisis.

I tell you that Michael Jackson is unbelievable, isn't he? He's just unbelievable!

Of all the works of civilization that interfere with the natural water distribution system, irrigation has been by far the most pervasive and powerful.

Civil disobedience has an honourable history, and when the urgency and moral clarity cross a certain threshold, then I think that civil disobedience is quite understandable, and it has a role to play.

Fear is the most powerful enemy of reason.

The conversation on global warming has been stalled because a shrinking group of denialists fly into a rage when it's mentioned.

Scientists with access to data from Navy submarines traversing underneath the North polar ice cap have warned that there is now a 75 percent chance that within five years the entire ice cap will completely disappear during the summer months.