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.

All economic activity is dependent upon that environment and its underlying resource base of forests, water, air, soil, and minerals. When the environment is finally forced to file for bankruptcy because its resource base has been polluted, degraded, dissipated, and irretrievably compromised, the economy goes into bankruptcy with it.

Our air, water, soil, forests, oceans, rivers, lakes, scenic beauty, wildlife habitat, minerals, that is the wealth of the country.

We must realize that we're all part of a web of life around the world. Anytime you extinguish a species, the consequences are serious.

Reaching a general understanding that sustainability is the ultimate issue will finally bring us face-to-face with the political challenge of forging a sustainable society during the next few decades. It is a challenge we can meet if we have the leadership and the political will to do so.

In the state of Wisconsin it's mandated that teachers in the social sciences and hard sciences have to start giving environmental education by the first grade, through high school

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.