Volatility is a symptom that people have no idea of the underlying value.

We live on a finite planet. We have finite resources, and we're running out of good, arable land.

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.

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.

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

Volatility is a symptom that people have no idea of the underlying value-that they have stopped playing the asset game. They're not buying because it's a company with certain attributes. They're buying because the price is rising. People are playing games not related to any concept at all of what the long-term value of the enterprise is. And they know it.

Remember that history always repeats itself. Every great bubble in history has broken. There are no exceptions.