Water Scarcity

As our world heats up, as pollution increases, as population grows and as our globe's resources of fresh water are tapped, we are faced with an environmental and humanitarian problem of mammoth proportions.

Demand for water is doubling every 20 years, outpacing population growth twice as fast. Currently 1.3 billion people don't have access to clean water and 2.5 billion lack proper sewage and sanitation. In less than 20 years, it is estimated that demand for fresh water will exceed the world's supply by over 50 percent.

The biggest drain on our water sources is agriculture, which accounts for 70 percent of the water used worldwide -- much of which is subsidized in the industrial world, providing little incentive for agribusiness to use conservation measures or less water-intensive crops.

This number is also likely to increase as we struggle to feed a growing world. Population is expected to rise from 6 billion to 8 billion by 2050.

Water scarcity is not just an issue of the developing world. "Twenty-one percent of irrigation in the United States is achieved by pumping groundwater at rates that exceed the water's ability to recharge," wrote water experts Tony Clarke of the Polaris Institute and Maude Barlow of the Council of Canadians in their landmark water book 'Blue Gold: The Fight to Stop the Corporate Theft of the World's Water'.

--Tara Lohan