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.

as a physician I examine the dying planet as I do a dying patient. The earth has a natural system of interacting homeostatic mechanisms similar to the human body's. If one system is diseased, like the ozone layer, then other systems develop abnormalities in function - the crops will die, the plankton will be damaged, and the eyes of all creatures on the planet will become diseased and vision impaired.

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

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.

If you inhale a millionth of a gram of plutonium, the surrounding cells receive a very, very high dose. Most die within that area, because it's an alpha emitter. The cells on the periphery remain viable. They mutate, and the regulatory genes are damaged. Years later, that person develops cancer. Now, that's true for radioactive iodine, that goes to the thyroid; cesium-137, that goes to the brain and muscles; strontium-90 goes to bone, causing bone cancer and leukemia.

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

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