Watch Vanguard online: Episode 19 World Without Water

As the 21st Century begins as the Age of Drought, a look at three places--Florida, China, and Nevada--where dryness has gone big. In Florida, the world's most famous swamp, the Everglades, has been turning into a salt flat. In China, vast problems with water pollution have been compounded in some areas by problems of having no water. And Nevada's Lake Mead, once the largest reservoir in the world, now is given a 50% chance of drying up completely in the next dozen years.

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