Overpopulation is perhaps the biggest problem facing us, and immigration is part of that problem. It has to be addressed.

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

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.

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

There is no place where we can safely store worn-out reactors or their garbage. No place!

If you want to get people off drugs, improve reality.

Overpopulation is perhaps the biggest problem facing us, and immigration is part of that problem. It has to be addressed.