Til The Rivers All Run Dry

Seventy-five percent of the world's fresh water is stored in glaciers, but scientists predict climate change will cause some of the world's largest glaciers to completely melt by 2030. What effect will this have on our daily lives? With global warming falling low on a national list of American concerns, it's time to take a deeper look at what could be a global calamity in the making.

Political instability and escalating violence make Pakistan a US foreign policy priority. But there's another looming crisis in the country. Pakistan is fast running out of water and much of what IS available is making people sick.

The World's Laura Lynch has the story in two parts.

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On Thin Ice is a special one-hour edition of NOW on PBS.

David Brancaccio and environmentalist Conrad Anker trek to India's Gangotri Glacier in the Himalayan Mountains, source of the Ganges River, and Montana's Glacier National Park to see the striking effects of global warming closer to home and learn how melting glaciers across the globe can have a direct impact on global food prices.

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In Bolivia, the Uru Chipaya have lived on high salt plains for 4,000 years. They use river water to flush salt out of the soil so they can farm. But now the river is drying up.

The BBC's Andres Schipani visited Bolivia's water people, thought to be the oldest surviving culture in South America.