Patriotism is nationalism, and always leads to war.

The future of our children is a trust we have been given. To conserve and grow, not to squander wastefully on needless excesses. The earth is a trust, to protect and to honor. Our home, our livelihood, our future rests in the quality of our stewardship. Let us become better stewards.

As a physician, I see the earth as a patient in the intensive care unit. We have an acute clinical crisis on our hands and must take urgent action. My prescription for survival is that the American people rise up as they did in the 1980s, when 80 percent of Americans supported the nuclear weapons freeze.

The whole world is being 'deculturalized' into a uniform 'Coca-Cola society,' wanting and needing an American way of life.

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

Every time you turn on an electric light, you are making another brainless baby.

Cuba is a wonderful country. What Castro’s done is superb.

As a doctor, as well as a mother and a world citizen, I wish to practice the ultimate form of preventive medicine by ridding the earth of these technologies that propagate disease, suffering, and death.

in terms of the biology of the planet, development is a euphemism for destruction.

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

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.

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.