About the show

"Planet in Peril: Battle Lines" examines the environmental conflicts between growing populations and natural resources. A worldwide investigation and two-hour documentary, hosted by Anderson Cooper , chief medical correspondent Dr. Sanjay Gupta and "The Oprah Winfrey Show" correspondent and National Geographic host Lisa Ling.The investigation continues at "Planet in Peril" Revisit the award-winning 2007 documentary Send your questions and comments to "Planet in Peril"