There are only four things in all cleaners - whether it's shampoo, laundry detergent, whatever.You buy them in bulk and you mix them up properly, and they all work. It doesn't matter if they call the stuff ecologically friendly or have dolphins diving around on the label - it still has these damn four things in it. Anything else is just unnecessary additions to make it smell good or color it blue when it goes down the toilet.

If you let people loose in a landscape and tell them to choose a house site, half of them will go sit on the ridges where they'll die in the next fire, or where you can't get water to them. Or they'll sit in all the dam sites. Or they'll sit in all the places that will perish in the next big wind.

You can hit a nail on the head, or cause a machine to do so, and get a fairly predictable result. Hit a dog on the head, and it will either dodge, bite back, or die, but it will never again react in the same way. We can predict only those things we set up to be predictable, not what we encounter in the real world of living and reactive processes.

The extinction rate is so huge now, we're to the stage where we've got to set up recombinant ecologies. There are no longer enough species left, anywhere, to hold the system together.

We don't have any power of creation - we have only the power of assembly. So you just stand there and watch things connect to each other, in some amazement actually. You start by doing something right, and you watch it get more right than you thought possible.

There are a few societies that show signs of having been very rational about the physics of construction and the physics of real life. Some of the old middle-Eastern societies had downdraft systems over whole cities, and passive, rapid-evaporation ice-making systems. They were rational people using good physical principles to make themselves comfortable without additional sources of energy.

"Should we tamper with nature?" is no longer a question - we've tampered with nature on the whole face of the Earth.