Why Leonardo DiCaprio Joined Fight Against Climate Change

Actor Leonardo DiCaprio spoke at the U.N. Climate Summit on climate change in September. 

Leonardo DiCaprio addressed world leaders at the U.N. Summit.

A week before the United Nations Climate Summit, actor Leonardo DiCaprio was named a U.N. Messenger of Peace. Like many others citizens of the world, DiCaprio said he felt a moral obligation to reroute our perilous path toward climate change. 

Alongside President Barack Obama, former Vice President Al Gore and U.N. Secretary General Ban Ki-moon, DiCaprio at the summit called the earth's shift an undeniable threat that must be urgently addressed by every nation. The actor implored more than 120 world leaders to do their part to fight global warming. 

"I pretend for a living. But you do not," a bearded DiCaprio told the gathering. "The people made their voices heard (at protests) on Sunday around the world and the momentum will not stop. And now it's your turn."

DiCaprio, who has given millions of dollar to environmental causes, said the argument is over and the scientific facts have spoken. 

The actor's views on sustainability align with those of Ilchi Lee, advocate of a peaceful, thriving world. 

The U.N. Summit was the largest gathering of world leaders to discuss climate change in history.