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James Hansen: Why I must speak out about climate change

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Published on Mar 7, 2012

http://www.ted.com 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.

TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's leading thinkers and doers give the talk of their lives in 18 minutes. Featured speakers have included Al Gore on climate change, Philippe Starck on design, Jill Bolte Taylor on observing her own stroke, Nicholas Negroponte on One Laptop per Child, Jane Goodall on chimpanzees, Bill Gates on malaria and mosquitoes, Pattie Maes on the "Sixth Sense" wearable tech, and "Lost" producer JJ Abrams on the allure of mystery. TED stands for Technology, Entertainment, Design, and TEDTalks cover these topics as well as science, business, development and the arts. Closed captions and translated subtitles in a variety of languages are now available on TED.com, at http://www.ted.com/translate

If you have questions or comments about this or other TED videos, please go to http://support.ted.com

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Top Comments

  • Xavier Moutoux

    When we wake up to the truth, we will see all-out conversion to clean, renewable energy as an absolute necessity, the equivalent of WWIII. The plan is explained in *The Present* @ TruthContest (.) com, check it out, what this book says will blow your mind and turn our world right-side up.

    · 14

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  • 2011ESD

    Joe Bastardi? Who claimed that the Arctic was going to go back to normal in his 2012 summer sea ice extent prediction and then looked like a fool as it decreased in 2012 and smashed the record in 2013 for lowest extent. Yea...follow him.

    · 6

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    in reply to patioperson (Show the comment)

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  • ivorysand

    Much better, thanks. Very good indeed.

    ·

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    in reply to Natchler (Show the comment)
  • Natchler

    wierd... maybe this will work

    /watch?v=52KLGqDSAjo&list=PL82­yk73N8eoX-Xobr_TfHsWPfAIyI7VAP­&index=1

    ·

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    in reply to ivorysand (Show the comment)
  • PrairleDoggedRez

    Ex hippie hobo ~ what a fucking nutjob.

    ·

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  • ivorysand

    Am I doing something wrong or is this link not working? I had "Invalid parameters".

    ·

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    in reply to Natchler (Show the comment)
  • TheSaltyAdmiral

    Do you honestly think you, YOU, though of that but none of the scientists did? hahaha

    ·

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    in reply to david K (Show the comment)
  • emailjwr

    superb content, but james hansen really needs to get a bit more animated. in this day and age one needs to keep people's attention, and this message needs to be heard

    ·

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  • MrApplewine

    James Hansen is truly the Messiah of Environmentalism. The non-believers should be cleansed ! We could even team up with the middle eastern muslims against our common enemy, the pro westerners in American and Europe.

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  • sonreiro

    Are you saying that the at times hypocritical or misguided actions of one man are proof that a concept involving the entire earth is invalid?

    And who is really making the money?

    The handful of small energy companies making millions promoting electric cars, solar panels, and other new ways of obtaining energy...

    or the multiple oil companies making BILLIONS...promoting that Climate Change is a joke is great for their business!

    · 2

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    in reply to GearysofWar (Show the comment)
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