While we know Leonardo DiCaprio as the Academy Award-winning actor, he's also been a longtime environmentalist as well as UN Messenger of Peace. And now he's teamed up with director Fisher Stevens to talk to politicians, scientists and people who have been directly affected by global warming and see how the way we live has been hurting the environment. Nine Inch Nails' Trent Reznor and Mogwai provide the soundtrack. 

“Before the Flood, directed by Fisher Stevens, captures a three-year personal journey alongside Academy Award-winning actor and UN Messenger of Peace Leonardo DiCaprio as he interviews individuals from every facet of society in both developing and developed nations who provide unique, impassioned and pragmatic views on what must be done today and in the future to prevent catastrophic disruption of life on our planet," according to the official synopsis.

Leo is set to play the lead role in the reboot of the '90s animated eco-TV show, Captain Planet. But before we see him become a superhero, you can watch the full documentary below.