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James Hansen: Why I must speak out about climate change

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.

English
  • Originally Aired March 7, 2012
  • Runtime 15 minutes
  • Content Rating United States of America TV-PG
  • Network YouTube
  • Created April 5, 2013 by
    Administrator admin
  • Modified April 5, 2013 by
    Administrator admin