There is no single theory that is used in economics that considers the finite nature of resources. It's shocking.

The language "it's too late" is very unsuitable for most environmental issues. It's too late for the dodo and for people who've starved to death already, but it's not too late to prevent an even bigger crisis. The sooner we act on the environment, the better.

Battering down solar cells on the roofs of Wal-Marts in California. I think that will be some of the highest-return investments that anyone ever makes.

The potential for alternative energy sources, mainly solar and wind power, to completely replace coal and gas for utility generation globally is, I think, certain. The question is only whether it takes 30 years or 70 years.

I think I'm right-brained, incapable of managing my way out of a brown paper bag.

Everyone asks about gold. This is the irony: just as Jim Grant tells us (correctly) that we all have faith-based paper currencies backed by nothing, it is equally fair to say that gold is a faith-based metal. It pays no dividend, cannot be eaten, and is mostly used for nothing more useful than jewelry. I would say that anything of which 75% sits idly and expensively in bank vaults is, as a measure of value, only one step up from the Polynesian islands that attached value to certain well-known large rocks that were traded.

Modern agriculture has been accurately described as a way of turning oil into food. As the price of oil continues to rise, so will the price of food.