In the last few years, the concept of peak oil has gained some traction. But peak water? Hardly at all. That most precious of all resources is in big trouble. We are running out of clean, drinkable water. Aquifers are being depleted at a rate that greatly exceeds their replenishment. Global warming is causing evaporation of surface water. Glaciers are melting. Droughts are spreading. Scientists now talk about the planet having hot stains. They have identified large areas of the earth as being water stressed. In the United States, the rapidly growing desert Southwest epitomizes the problem. But it's not just Phoenix and Las Vegas, water issues exist from Los Angeles to Atlanta to Australia to India. The water crisis is like a comet poised to hit the earth. Urgent action is required, yet the words conservation and planning are barely heard.