In certain ways, I'm not very different than I was when I was a teenager.

The first law of ecology is that everything is related to everything else.

Everything is connected to everything else. Everything must go somewhere. Nature knows best. There is no such thing as a free lunch.

As the earth spins through space, a view from above the North Pole would encompass most of the wealth of the world - most of its food, productive machines, doctors, engineers and teachers. A view from the opposite pole would encompass most of the world's poor.

Finally, since human beings are uniquely capable of producing materials not found in nature, environmental degradation may be due to the resultant intrusion into an ecosystem of a substance wholly foreign to it.

The environmental crisis is a global problem, and only global action will resolve it.

All of the clean technologies are known, it's a question of simply applying them.