Previous posts have examined the growing scarcity of fresh water. The World Bank predicts that fresh water will be the "oil" of the 21st century.
Market Sketpics today has a good article examining depletion of the Ogallala aquifer in the U.S., which covers approximately 174,000 square miles. China also faces water pressures, as do many other countries in the world. However, little public dialogue exists about how to address looming shortages.