Save water,if you want to live longer

The news is grim. In China, India, the U.S. and elsewhere, people are depleting aquifers faster than they are being replenished. At current rates of consumption and growth, two-thirds of the world's population will face water scarcity in 20 years. Drought has come to sear not just famously dry places like Arizona and Australia but also cities like Atlanta and Barcelona. Water-borne diseases kill 5 million people each year--more than AIDS and war combined. In short, the prognosis is poor--if, that is, we continue our wayward ways. Fortunately, we don't have to. Unlike such global problems as war and poverty, the water crisis stands a good chance of being solved in our lifetimes, through human ingenuity.