Lake Chad is shrinking rapidly, threatening the millions of people who depend on it for their survival. But some locals are fighting back in a bid to preserve their way of life.
Up to 30 million people are facing "a humanitarian disaster" as one of Africa's biggest lakes shrinks, a United Nations agency warned Thursday.
Planet in Peril, a CNN worldwide investigation, takes viewers around the globe in a two-part, four-hour documentary that examines our changing planet. Planet in Peril looks at four key issues: climate change, vanishing habitats, disappearing species and human population growth.
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