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Water Supply In The United States

“Water covers approximately 70 percent of the Earth’s surface, but less than 1 percent of that is available for human use. The world must share this small amount for agricultural, domestic, commercial, industrial, and environmental needs. Across the globe, water consumption has tripled in the last 50 years. Managing the supply and availability of water is one of the most critical natural resource issues facing the United States and the world.”

http://www.epa.gov/WaterSense/pubs/supply.html

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