I am acutely aware of the fact that the marriage between mathematics and physics which was so enormously fruitful in past centuries, has recently ended in divorce.

The technologies that raise the fewest ethical problems are those that work on a human scale, brightening the lives of individual people.

Just because you see pictures of glaciers falling into the ocean doesn't mean anything bad is happening. This is something that happens all the time. It's part of the natural cycle of things. We know from measurements that glaciers have been melting for 200 years at least.

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

I like people who are working on practical things and who are working in teams. It's not so important to get the glory. It's much more important to get something that works. It's a better way to live.

The essential fact which emerges ... is that the three smallest and most active reservoirs ( of carbon in the global carbon cycle), the atmosphere, the plants and the soil, are all of roughly the same size. This means that large human disturbance of any one of these reservoirs will have large effects on all three. We cannot hope either to understand or to manage the carbon in the atmosphere unless we understand and manage the trees and the soil too.