Michael C. Hall visits the shrinking island of Banishanta.

Matt Damon on why he cares about climate change and how he got involved with Years of Living Dangerously.

Michael C Hall gets a hands on lesson in navigating the ins and outs of navigating Dhaka.

Michael C Hall speaks about why he cares about climate change.

Jessica Alba talks about her commitment to sustainability.

Years of Living Dangerously Producers go behind the scenes in Vernal, Utah.

America Ferrera sits down with Jigar Shah to discuss the rise of renewables in the U.S.

Mark Bittman talks about why he cares about Climate Change.

Pete, a local fisherman in Puget Sound, discusses his family-owned fishing business and the threat to his livelihood that ocean acidification poses

Hurricane Sandy destroyed Gigi's restaurant, but she finds a new way to bring comfort to her neighbors by joining the recovery effort.

Ian Somerhalder talks about why he cares about climate change and why he's involved in this series.

Bob Inglis and a group of young Republicans go knocking on doors to get signatures in Paul Ryan's home district to get support for action on Climate Change.

Anna Jane joins a Sierra Club protest of the keystone XL pipeline at the White House. But in doing so she risks arrest.

Staten Island firefighters talk about their experience the night Hurricane Sandy hit New York.

Arnold Schwarzenegger talks about why he cares about climate change and explains his worldwide crusade to make an impact.

Harrison Ford visits Michael Stuewe of the World Wildlife Fund and Rebecca Moore of Google Earth to find out what effect his visit to Indonesia has had on the protection of tropical forest land.

Harrison Ford visits an island refuge for 1200 animals whose homes have been destroyed by deforestation.

Arnold Schwarzenegger spends a day with the Snake River Hot Shots as they create a perimeter and clear any fuel that could cause the wildfire to spread.

Harrison Ford talks about why he cares about climate change and why he got involved in the series.

Thomas Friedman talks about why he cares about climate change and what he's seen while working on this series.

James Cameron, Jerry Weintraub and Arnold Schwarzenegger weigh in on why they care about climate change and their motivation for making this series.

Don Cheadle talks about why he cares about climate change and what he's seen while working on this series.

Harrison Ford learns the A B C's of climate change.

The Ford Foundation's Steve Rhee explains the contentious, sometimes violent interactions between native groups and agricultural companies, as the tropical forest is turned into plantations.