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Discover what the world's leading experts - from scientists and economists to environmentalists and entrepreneurs - think about the most important questions facing the world today. Sign up for free to share, download or embed clips from our continually updated database of videos, or to discuss the issues with other users.
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Lester Brown
What is the future for World food supplies? (Part 1)
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Annie Lennox
What does it mean to be 'green'?
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Eric Schlosser
What's wrong with conventional agriculture?
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Amory Lovins
How can America reduce its need for foreign oil? (part 2)
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David Wasdell
What are 'climate feedbacks'?
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Nicholas Dunlop
How can national parliaments best work together?
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Herbert Girardet
What are the consequences of urbanization in China?
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Kaarin Taipale
How do we make cities truly safe?
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David Orr
Why is a love of nature important?
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Marshall Rosenberg
What are the real roots of violence? (Part 2)
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Vandana Shiva
Why does biodiversity loss matter?
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Tariq Banuri
Can economics measure everything? (Part 1)
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John Todd
how should we deal with sewage? (part 2)
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Hans Joachim Schellnhuber
Is global warming already taking its toll?
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Karl-Henrik Robert
How can businesses change to do more good?
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Frances Moore Lappé
How can individuals make a difference? (Part 1)
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Deepak Chopra
What place does religion have in today's world?
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Tony Juniper
How can we be made aware of the impact of our actions?
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Bill Joy
What are the risks with genetic modification?
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Mark Halle
How do environmental problems affect global security?
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