You don't have a conservation policy unless you have a population policy.

It is absolutely imperative that we protect, preserve and pass on this genetic heritage for man and every other living thing in as good a condition as we received it.

Apollo 13, as you may remember, gave us a reactor that is bubbling away right now somewhere in the Pacific. It's supposed to be bubbling away on the moon, but it's in the Pacific Ocean instead.

When people say, 'You're not being realistic,' they're just trying to tag some thoughts that they can't otherwise handle.

Have fun saving the world, or you are just going to depress yourself.

I began working with the John Muir Institute and then started helping found Friends of the Earth organizations here and there in other countries. That pretty well brings us up to the present.

A great deal of pressure was then built up to remove me from the club and my resignation was, finally, a forced one.