Did you know that only 1% of Earth's water is fresh and available for consumption? Fresh water is the world's most essential natural resource, but it's also one of the most threatened. National Geographic magazine's April issue celebrates and explores this important resource. Learn more about this Special Issue http://environment.nationalgeographic.com/environment/freshwater Water: A Special Issue http://ngm.nationalgeographic.com/2010/04/table-of-content
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