Humans on the Earth behave in some ways like a pathogenic micro-organism, or like the cells of a tumor.

A billion could live off the earth; 6 billion living as we do is far too many, and you run out of planet in no time.

By the end of this century, climate change will reduce the human population to a few breeding pairs surviving near the Arctic.

Sadly, it's much easier to create a desert than a forest.

I don't think we're yet evolved to the point where we're clever enough to handle a complex a situation as climate change. The inertia of humans is so huge that you can't really do anything meaningful.

I have a feeling that climate change may be an issue as severe as a war. It may be necessary to put democracy on hold for a while.

Those of us who consider ourselves to be somehow involved in the birthing of a new age, should discover Gaia as well. The idea of Gaia may facilitate the task of converting destructive human activities to constructive and cooperative behavior. It is an idea which deeply startles us, and in the process, may help us as a species to make the necessary jump to planetary awareness.