On the top of these mile thick slabs of ice the water is percolating quickly to the base and greasing the skids, as it were, for the slide of that ice into the ocean.

I don't spend a huge amount of time fixated on climate denial because I don't think that their objections, though sometimes couched in science, are based in science. I think they're based in ideology. And I don't think there's anything you can do.

The fact that Washington has been a complete logjam for anything for the last six years has got to change because we need to have federal policy that really allows us to move quickly and nimbly.

In the last two years 24 countries have set new all-time temperature records. We've seen flooding on an epic scale in every continent .

We don't know exactly where all the tipping points are in the physical world for inescapable damage, but we're clearly reaching close to some of them.

I think [George W.] Bush has done nothing right about global warming.

What we're talking about is the endless, gullible elevation of necessary levels of comfort and status and everything else at the complete expense of all around us. It's going to take us a long time to learn how to climb down a little bit from the heights on which we have put ourselves.