If anybody here has trouble with the concept of design humility, reflect on this: It took us 5,000 years to put wheels on our luggage.

Here's where redesign begins in earnest, where we stop trying to be less bad and we start figuring out how to be good.

We prefer to talk about 100% renewable instead of zero carbon. When you say zero carbon, you are not positively defined.

I'd rather have that dialogue right now than only the other one, which is starting at such a basic level, that we start rearranging stuff on the Titanic, trying to be less bad with ordinary stuff.

Our goal is a delightfully diverse, safe, healthy, and just world, with clean air, water, soil and power – economically, equitably, ecologically and elegantly enjoyed.

Honor commerce as the engine of change.

We have carbon in the atmosphere. That is a material in the wrong place problem. It's just like what I said about the lead. Lead in the biosphere is not good. Carbon in the atmosphere (over natural levels) is a problem.