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Why I must speak out about climate change - James Hansen

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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.


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  • Speaker James Hansen
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More on James Hansen's work.

10 solutions for climate change.

An overview of the science behind global warming.
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Meet The Creators

  • Speaker James Hansen

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