So long as you have courage and a sense of humor, it is never too late to start life afresh.

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.

Science and religion are, of course, two different ways of looking at the universe; and it's the same universe with two different windows.

Humanity looks to me like a magnificent beginning but not the final word.

Everything in my life was luck.

CO2 is so beneficial...it would be crazy to try to reduce it

A good scientist is a person with original ideas. A good engineer is a person who makes a design that works with as few original ideas as possible. There are no prima donnas in engineering.