Environment: Water

Water shortages and problems around the U.S. and the world have many wondering what is the true cost of clean and reliable water.

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Rivers of Oil, Episode 4: The rallying cry

April 2014 protests in Washington, D.C.

In the early 2000s, the Keystone XL oil pipeline became one of the most powerful symbols in the fight against climate change. And since then, it's not just local landowners fighting pipelines in their backyards anymore. It's environmental groups, Native Americans tribes, farmers and ranchers, and a crucial addition to the alliance -- climate change activists. But how did it begin?