Access: Leonardo DiCaprio has unveiled his climate change documentary "Before the Flood" at the Toronto International Film Festival, saying the film is intended to "give the scientific community a voice."
The film was directed by Fisher Stevens. It chronicles DiCaprio's exploits around the globe to raise awareness about climate change.
DiCaprio is a United Nations Ambassador of Peace. He was greeted by fans outside the film's premiere Friday.
The Academy Award-winning actor says, "We are truly at...