Pollution is an unused resource.

You don’t have a snail problem, you have a duck deficiency.

Instead of physicists teaching physics, physicists should go home and see what physics applies to their home.

The American lawn uses more resources than any other agricultural industry in the world. It uses more phosphates than India and puts on more poisons than any other form of agriculture.

Wealth is a deep understanding of the natural world.

You should never have gotten to the stage where you could see the last ancient forests! Just get out of there right now, because the lessons you need to learn are there. That's the last place you'll find those lessons readable.

Though the problems of the world are increasingly complex, the solutions remain embarrassingly simple.