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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.

    · 16

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  • Canaana Bolaanan

    See, but he's a scientist and not a clown. So when you present your reality in such a backwards way, it's so easy not to take you seriously. Look up Climate . Nasa . Gov for what reasonable, intelligent people who understand science think about climate change. You might be shocked to find how out of the loop you truly are.

    · 6

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    in reply to Eddi Rebel (Show the comment)

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  • PrairleDoggedRez

    Then if that did not have you cooking up bad dreams ~

    .

    ''Strong also said:
“Isn’t it the only hope for the planet that the industrialized civilizations collapse? Isn’t it our responsibility to bring that about?”

    .

    Goodnight children it will be OK in the morning ( Not )

    ·

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    in reply to PrairleDoggedRez (Show the comment)
  • PrairleDoggedRez

    Another bedtime story ~

    .

    ''Maurice Strong, U.N. Secretary- General, of the 1992 Rio Earth Summit quotes:

    1992 at Rio
“It is clear that current lifestyles and consumption patterns of the affluent middle class — involving high meat intake, consumption of large amounts of frozen and convenience foods, use of fossil fuels, ownership of motor vehicles and small electrical appliances, home and work-place air conditioning, and suburban housing — are not sustainable.”

    ·

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  • PrairleDoggedRez

    So Edenhofer was just telling a fairy tale then ? ~ perhaps he was just trying to scare the older children ~ or was he?

    ·

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    in reply to NoEcologyNoEconomy (Show the comment)
  • NoEcologyNoEconomy

    You're taking history out of context to make people look benign. It's dishonest to compare eons of random extinctions to the vastly accelerated extinctions caused by the only species capable of unnaturally manipulating nature.

    In ancient epochs, the only extinction events that rivaled today's man-made ones were caused by asteroids, volcanoes and other unstable factors on a still primordial planet.

    Look up "the sixth extinction" and pitch your false comparisons to biologists who know better.

    ·

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    in reply to sdkee (Show the comment)
  • NoEcologyNoEconomy

    Are you claiming that Fourier, Tyndall and Arrhenius used time machines to collude with modern-day climatologists as part of a vast conspiracy to pretend that CO2 is actually a heat-trapping gas?

    Yeah, that's surely logical.

    ·

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    in reply to PrairleDoggedRez (Show the comment)
  • NoEcologyNoEconomy

    Booker is a mindless Creationist science-denier. He carries no real acumen.

    We have to get off of fossil fuels one way or another, so solving climate change is a win-win scenario. Peak Oil may do it for us. In fact I think it's the only thing that will. Oil will get far too costly to keep wasting. Most people are just drones who don't think much about future consequences, but they do pay attention to money when it hurts to spend it.

    ·

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    in reply to youhtm12 (Show the comment)
  • Billy Athens

    watch?v=wlkB7LWo5eo

    ·

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  • youhtm12

    I would advise everybody to read the book: "The Real Global Warming Disaster", by Christopher Booker. Is the obsession with `climate change' turning out to be the most costly scientific blunder in history?

    ·

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  • PrairleDoggedRez

    Google 'Ottmar Edenhofer' redistribution of wealth via climate policy'

    .

    This is their agenda ~ plain and simple and you are the ones footing the bill.

    ·

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  • HIGHLANDKING1

    Remember when Nasa used to do things? like land on the moon

    but since the 60's we chose diversity and now talk about climate change...

    its time to get the western world back on track - northwest front.org

    ·

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