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James Hansen: Why I must speak out about climate change
About this film
Top climate scientist James Hansen tells the story of his involvement in the science of and debate over global climate change. In doing so he outlines the overwhelming evidence that change is happening and why that makes him deeply worried about the future.
Directors & creators
TED.com
Subjects
TEDTalks, TED2012, TED, Talks, climate change, environment, global issues, science, 2012
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