...the computer models are very good at solving equations of fluid dynamics but very bad at describing the real world. The real world is full of things like clouds and vegetation and soil and dust which the models describe very poorly.

The idea that global warming is the most important problem facing the world is total nonsense and is doing a lot of harm.

Mostly I'm just writing books for the public, and so I try to describe for the public what the choices are, what they might have to expect in the future and so by warning people ahead of time maybe you have an effect.

We cannot hope to either understand or to manage the carbon in the atmosphere unless we understand and manage the trees and the soil too.

Of course, long-distance running has to do with the fact that we're hunters.

The purpose of thinking about the future is not to predict it but to raise people's hopes.

If we want to go to space with humans, that's for fun not for science. Human adventures in space are just sporting events.