This essay gives a deep historical context to the challenges faced by New York State as it attempted to bring its water supply - including a network that affects millions of people living in and around New York City - into compliance with the federal government's new Environmental Protection Agency criteria. From upstate farmers to downstate industries to environmental protection groups, everyone has a stake in the outcome of this multi-billion dollar overhaul.

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There aren't too many encouraging stories when it comes to restoring damaged ecosystems, but people in southern Thailand's Trang Province tell one of them, thanks to an innovative grassroots organization called Yad Fon. Founded in 1984, Yad Fon set out to rehabilitate the mangrove ecosystems that had sustained families in the area for thousands of years. How? By helping villagers manage their own natural resources.

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Use this interactive Google Map to trace the complex system of the Colorado River from small mountain streams to the modern dams and canals of Arizona, California and the Mexican border. Zoom in and click on each placemarker for more information about the river's impact on the changing landscape of the American Southwest.

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