Before the Flood

Actor and environmental activist Leonardo DiCaprio travels the world to examine firsthand the effects of climate change, and to learn more about possible ways to prevent catastrophic damage that could make the Earth unsustainable for human life. During his journey, he speaks with such influential figures as President Barack Obama, Pope Francis, and tech innovator Elon Musk, and makes a speech before the United Nations calling for greater action on this issue. Directed by Fisher Stevens.