The bigger the population gets, the more serious the problems become... We have to address the population issue. The United Nations, with the U.S. supporting it, took the position in Cairo in 1994 that every country was responsible for stabilizing its own population. It can be done. But in this country, it's phony to say 'I'm for the environment but not for limiting immigration.'

The bigger the population gets, the more serious the problems become... We have to address the population issue. The United Nations, with the U.S. supporting it, took the position in Cairo in 1994 that every country was responsible for stabilizing its own population. It can be done. But in this country, it's phony to say 'I'm for the environment but not for limiting immigration.'

Trails are relatively inexpensive. A splendid national network of all kinds of trails can be established at less cost than a few hundred miles of super highway.

If we human beings learn to see the intricacies that bind one part of a natural system to another and then to us, we will no longer argue about the importance of wilderness protection, or over the question of saving endangered species, or how human communities must base their economic futures - not on short-term exploitation - but on long-term, sustainable development.

The most important environmental issue is one that is rarely mentioned, and that is the lack of a conservation ethic in our culture.

I think the internal combustion engine will disappear from the streets of our cities in the next thirty years because transportation will be mass transportation, or probably electrical power.

If we continue to address the issue of the environment where we live as though we're the only species that lives here, we'll create a disaster for ourselves