I've got personal views on the '60s. You can't have freedom without paying the price for it.

We are in a fool's climate, accidentally kept cool by smoke, and before this century is over billions of us will die and the few breeding pairs of people that survive will be in the Arctic where the climate remains tolerable.

The tropical rain forests are a telling example. Once cut down, they rarely recover. Rainfall drops, deserts spread, the climate warms.

Florida will be gone altogether, the whole damned place, in not too long.

The world has not warmed up very much since the millennium.

Evolution is a tightly coupled dance, with life and the material environment as partners. From the dance emerges the entity Gaia.

I'm not a pessimist, even though I do think awful things are going to happen.