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As Paris Summit Begins, What Would A Successful Climate Deal Look Like?

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Climate models project 21st century global temperatures. NASA's Scientific Visualization Studio and NASA Center for Climate Simulation hide caption

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NASA's Scientific Visualization Studio and NASA Center for Climate Simulation

Big Data Predicts Centuries Of Harm If Climate Warming Goes Unchecked

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Greenbuild Conference Showcases Energy Saving Technology For Buildings

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Record Breaking Smog In China, India Underlines Climate Summit In Paris

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Paris Continues To Recover As Global Leaders Attend Climate Summit

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Obama Calls For Decisive Action Against Climate Change At Paris Summit

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President Obama (from left), French President Francois Hollande and Microsoft co-founder Bill Gates applaud a speech during the Mission Innovation event at the UN conference on climate change Monday in Paris. Jim Watson/AFP/Getty Images hide caption

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Jim Watson/AFP/Getty Images

A building called Sustainability Base, at NASA's Ames Research Center in Mountain View, Calif., has an energy-efficient design that allows in sunlight. So for most of the year, the interior is illuminated by natural light. Dominic Hart/NASA hide caption

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Dominic Hart/NASA

NASA Uses Lessons From Space To Design An Efficient Building

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A view of the opening of COP21 on climate change Monday in Paris. More than 150 world leaders are meeting for the 21st Session of the Conference of Parties to the United Nations Framework Convention on Climate Change. Patrick Aventurier/Getty Images hide caption

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Patrick Aventurier/Getty Images

A power-generating windmill turbine is seen in front of the Arc de Triomphe on the Champs Elysees avenue in Paris ahead of the COP21 World Climate Summit, which begins Monday. Christian Hartmann/Reuters /Landov hide caption

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Christian Hartmann/Reuters /Landov
Valero Doval/Ikon Images/Corbis

Patients Want To Price-Shop For Care, But Online Tools Unreliable

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Delegates from about 170 countries gathered in Kyoto in December 1997 during the United Nations Framework Convention on Climate Change. This year in Paris, the stakes are even higher, negotiators say. AFP/Getty Images hide caption

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AFP/Getty Images

Kyoto Treaty Fizzled, But Climate Talkers Insist Paris Is Different

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Recordings Might Sound A Silent Alarm About California Drought

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2 Degrees In Paris: The Global Warming Set To Dominate Climate Conversation

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Drought Turns Spotlight On Future Of California Farms

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