You're going to have to change the priorities of your life, if you love this planet.

Teachers, I believe, are the most responsible and important members of society because their professional efforts affect the fate of the earth.

The U.S. population, a mere four or five percent of the world total, creates half the world's toxic waste.

You're going to have to change the priorities of your life, if you love this planet.

It is clear to me that unless we connect directly with the earth, we will not have the faintest clue why we should save it.

Capitalism is destroying the earth.

The massive quantities of radiation that would be released in a war fought with nuclear weapons might, over time, cause such great changes in the human gene pool that following generations might not be recognizable as human beings.