For 7 million people living on thousands of islands scattered across the Pacific ocean, global warming is not something that looms in the distant future: it's a threat whose first effects may have already begun.

Through personal stories of Pacific Islanders, RISING WATERS: Global Warming and the Fate of the Pacific Islands puts a human face on the international climate change debate.

The majority of scientists around the world now agree that global warming is real, and key studies show that the tropical Pacific islands will be hit first and hardest by its effects. The water temperature in the tropical Pacific has risen dramatically over the last two decades, bleaching coral and stressing marine ecosystems. Sea level rise threatens to inundate islands, and extreme weather events -- such as more frequent and intense El Niños, severe droughts, and mega hurricanes -- could wipe out ecosystems and the way of life that has existed for thousands of years.

"Way before most of these islands go under, they're going to lose their fresh water supply." Anginette Heffernan, Fiji

In the program, islanders show the viewers the physical and cultural impacts caused by global warming. Unusual high tides have swept the low-lying atolls of Micronesia, destroying crops and polluting fresh water supplies. Ancestral graveyards are being destroyed by the impacts of rogue waves and erosion never witnessed before the last decade. An increase in the frequency and intensity of hurricanes is making it difficult for island communities and ecosystems to recover.

"It's very difficult for someone living in the United States to grasp the fact that if the sea level rises just a few feet, a whole nation will disappear." Ben Graham, Republic of the Marshall Islands

But the islanders' stories have not convinced everyone in the rest of the world. Some scientists refute the studies, and business leaders and economists warn that forcing industries to drastically reduce greenhouse gas emissions will cause a global economic collapse.

While the policy makers and scientists argue about when and how much to reduce greenhouse gas emissions over the next twenty years, many Pacific Islanders are wondering if they will have a future. One thing is known: the longer emission reductions are delayed, the harder it will be to curb the effects of global warming, and prevent sea level rise from devastating the Pacific Islands.

What, then, should the islanders do? Whom should they believe? Where would they go if forced to leave their homes? RISING WATERS explores what it means to live under a cloud of scientific uncertainty, examining both human experience and expert scientific evidence. The problems facing the islanders serve as an urgent warning to the rest of the world.