Less than 10% of the fuel energy burned in automobiles is translated into forward motion of the vehicle and even then most of this energy is needed to move the vehicle itself, which typically weighs 20 times more than its passengers.

A book is like a single tree in a forest, in that it exists in conjunction with and because of a great many others around it.

In nature there is no such thing as waste. In nature nothing is wasted; everything is recycled.

I see a world in the future in which we understand that all life is related to us and we treat that life with great humility and respect. I see us as well as social creatures, and when I began to look back and say, ‘what is the fundamental bottom line for us as social creatures?’I couldn’t believe it because it seemed so hippy dippy, but it was Love. Love is the force that makes us fully human.

Over and over, we hear politicians say they can't spend our tax dollars on environmental protection when the economy is so fragile.

For the first time since life appeared on earth, one species- us- is single-handedly altering the physical, chemical and biological nature of earth. We have become a force of nature

One of the joys of being a grandparent is getting to see the world again through the eyes of a child.