At least half of every city is wrong. From latitude 30 degrees to latitude 60, say, you've got to have the long axis of the house facing the sun. If the land is cut up into squares, that makes half of all houses wrong if they face the road. Even houses way in the country, and way off the road, face the bloody road. And from there, you just go wronger all the way.

If you're a simple person today, and want to live simply, that is awfully seditious. And to advise people to live simply is more seditious still.

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.

A house should look after itself - as the weather heats up the house cools down, as the weather cools down the house heats up. It's simple stuff, you know? We've known how to do it for a long time.

My students are constantly amazing me.

Permaculture is an integrated, evolving system of perennial and self-perpetuating plants and animal species useful to man.