National Geographic will kick off its first ever Earth Week on Sunday, October 30, launching six straight days of primetime programming focused on climate change. The broadcasting event, timed to lead up to the U.S. presidential election, will feature the global premieres of Before the Flood, Leonardo DiCaprio's documentary about climate change, and the second season of the Emmy-winning Years of Living Dangerously, in which Hollywood correspondents such as David Letterman, Arnold Schwarzenegger, Cecily Strong, and more travel around the world to witness its effects on communities and ecosystems. Earth Week begins at 7/6c on National Geographic on Oct. 30, and will continue nightly until Friday, Nov. 4.