Of course, the English countryside is completely artificial. It was naturally a forest; they chopped down the trees and made it into what it is now: really a beautiful country.

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.

It is characteristic of all deep human problems that they are not to be approached without some humor and some bewilderment.

There is nothing so big nor so crazy that one out of a million technological societies may not feel itself driven to do, provided it is physically possible.

I am hoping that the scientists and politicians who have been blindly demonizing carbon dioxide for 37 years will one day open their eyes and look at the evidence.

We must be careful not to discourage our twelve-year-olds by making them waste the best years of their lives preparing for examinations.

We simply don't know yet what's going to happen to the carbon in the atmosphere.