The Sierra Club is a very good and a very powerful force for conservation and, as a matter of fact, has grown faster since I left than it was growing while I was there! It must be doing something right.

All I know about thermal pollution is that if we continue our present rate of growth in electrical energy consumption it will simply take, by the year 2000, all our freshwater streams to cool the generators and reactors.

I believe in the rights of creatures other than man.

We are no longer inheriting the Earth from our parents, we are stealing it from our children.

People have alleged that I have inspired many young people over the years, but I say, it was just the opposite.

True wilderness is where you keep it, and real wilderness experience cannot be a sedentary one; you have to seek it out not seated, but afoot.

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