 The three hottest years in the last thousand have all occurred since 1998. How much has the greenhouse effect changed our world? To what degree is human activity responsible? How bad might things get? And what can we do to mitigate this potentially catastrophic climatic trend? Motivated by his respect for the natural world and alarmed by the rapidly changing state of the planet, acclaimed naturalist Sir David Attenborough searches for answers in this two-part series. A sobering counter-argument to global warming naysayers and an unambiguous call to action. Produced by the Open University. 2-part series, 60 minutes each.
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