President Obama attended the plenary session of the international climate conference Monday, just outside Paris. By using regulations instead of treaties, Obama hopes to continue to cut U.S. emissions of greenhouse gases. Eric Feferberg/AFP/Getty Images hide caption

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How Obama Hopes To Achieve U.S. Climate Goals

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Pipes for TransCanada's planned Keystone XL pipeline are stored in Gascoyne, N.D. The U.S. House has voted to approve the proposed project, which would allow crude oil to flow from Canada to the Gulf of Mexico. The Senate plans to vote Tuesday on legislation that would greenlight the project. Andrew Cullen/Reuters/Landov hide caption

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What You Need To Know About The Keystone XL Oil Pipeline

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Pumpjacks at the Inglewood oil fields in California in March. Some of the most controversial methods of oil extraction, like fracking, oil sands production and Arctic drilling, are also expensive. That's made them less profitable as the price of oil continues to fall. Richard Vogel/AP hide caption

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Falling Oil Prices Make Fracking Less Lucrative

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Former South Carolina Republican Rep. Bob Inglis now runs the Energy and Enterprise Initiative. /Energy and Enterprise Initiative hide caption

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New Groups Make A Conservative Argument On Climate Change

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President Obama gestures during his speech on America's energy security, Wednesday, March 30, 2011, at McDonough Gymnasium at Georgetown University Pablo Martinez Monsivais/AP hide caption

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