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.

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.

Even if you build the perfect reactor, you're still saddled with a people problem and an equipment problem.

Understanding how DNA transmits all it knows about cancer, physics, dreaming and love will keep man searching for some time.

To me, a wilderness is where the flow of wildness is essentially uninterrupted by technology; without wilderness the world is a cage.

I'm always impressed with what young people can do before older people tell them it's impossible

Without wilderness, the world's a cage.