A world where one tenth of the population gets to be extremely wealthy, and six tenths very poor, is not, in the long run, a stable place.

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

The Arctic and the Antarctic are melting quickly. We may have waited too long to get started. But this is a day for optimism because the battle is fully joined, and the idea that big oil is unbeatable is no longer true.

From some tiny portion of the wealth the west accumulated in a hundred years of filling the atmosphere with carbon.

You can have a healthy fossil-fuel balance sheet, or a relatively healthy planet

When we think about global warming at all, the arguments tend to be ideological, theological and economic.

I'm not sure I'm a very good source of advice since we're kind of making this up as we go along.