Global Warming : What You Need To Know : Discovery Channel Discovery Channel visits global warming tipping points across the planet, talks to the world’s leading experts, and examines the latest evidence about climate change. Navigation TV Schedule Video Highlights About the Show Global Warming 101 Warming Signs and Sources Climate Change History Hot Spots Slide Show Greenhouse Challenge Talk About It WebLinks Ticker Visit Discovery News for top stories about Planet Earth. Features An Expert Responds Read a geoscientist's responses to your climate change questions. Warming 101 What is global warming? About the Show Discovery Channel brings clarity to a hot topic. Watch Video See scientists at work. Hot Spot Shots Peruse photos documenting change.

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