A worldwide investigation
• Brazil: Deforestation in the rainforest
• Carteret Islands: Changing tides
• Central Africa: Water loss in Lake Chad
• China: Air pollution a major problem
• Greenland: How fast is the ice melting?
• Madagascar: Biodiversity off the African coast
• Southeast Asia: Animal sanctuary in Cambodia
• Alaska: Tracking polar bears in the Arctic
• Yellowstone National Park: Reintroducing gray wolves
About the show"Planet in Peril" examines the environmental conflicts between growing populations and natural resources.
• Send your questions and comments to "Planet in Peril"
• Revisit the 2008 two-hour special, "Planet in Peril: Battle Lines."
• Available in U.S. stores now
Tracking wolves in Yellowstone
For EducatorsUse these in-depth research activities and videos to help students understand the issues facing our planet. Want more free educator materials? Go to CNN Student News
• Activities: Planet in Peril | Climate change | Deforestation | Species loss | Overpopulation | Quiz | Questions
• Videos: Global warming | Deforestation | Species loss | Overpopulation