Before the Flood
This film is a call to action. Leonardo DiCaprio, named as a United Nations Ambassador of Peace, is followed as he travels to many countries, and bears witness to climate change on a large scale. On his travels, he talks with scientists, politicians and activists, asking what can be done. Interviewees include entrepreneur/inventor Elon Musk, meteorologist/astronaut Piers Sellers, activist/environmentalist Sunita Narain and President Barack Obama.