All the science in the last few years, or almost all of it, really serves to show that the [climate] effects are larger and more rapid than we had thought even a decade ago.

I'm far less a leader than a writer.

There is no ideal Christmas; only the one Christmas you decide to make as a reflection of your values, desires, affections, traditions.

Probably nothing that we have ever managed to do quite equals the basic undermining of the physical stability of the planet on which most of the world's poor people depend.

... the constant flow of images undercuts the sense that there's actually something wrong with the world. How can there really be a shortage of whooping cranes when you've seen a thousand images of them - seen ten times more images than there are actually whooping cranes left in the wild?

We use the web to help people organize in the flesh, and then we take the images of those events and put them back on the web to make them add up to more than the sum of their parts.

There's no happy ending where we prevent climate change any more. Now the question is, is it going to be a miserable century or an impossible one, and what comes after that.