For the longest time, people have taken water for granted. Most people don't think about where their water comes from. They just turn on the tap, and they expect it to be there. Those days are ending.

This notion that we'll have water forever is wrong. California is running out. It's got 20-some years of water. New Mexico has got 10, although they're building golf courses as fast as they can, so maybe they can whittle that down to five. Arizona, Florida, even the Great Lakes now, there's huge new demand.

The Nile River doesn't reach its end. The Colorado River, the Yellow River in China, they, for the most part, don't flow anymore to the sea.

You know those movies where there's the comet coming at the earth, and all of a sudden the governments of the world say, "Gee, we're not -- our differences aren't so big anymore, because we're about to all die"? That's really where we are. There is a comet coming at us. It's called water shortage.