A coal-bed methane well sits abandoned in a pool of water outside Gillette, Wyo. It's more expensive than it looks to clean up. Stephanie Joyce/Wyoming Public Radio hide caption

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The first foundation jacket installed by Deepwater Wind in the nation's first offshore wind farm construction project is seen next to a construction crane on Monday, on the waters of the Atlantic Ocean off Block Island, R.I. Stephan Savoia/AP hide caption

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PREPA's Central Palo Seco power station in San Juan, Puerto Rico. The utility's bondholders want to raise rates. That's a challenge when the median income is about half that of Mississippi, yet the U.S. territory's energy costs are among the highest in the nation. Alvin Baez-Hernandez/Reuters/Landov hide caption

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A flag bearing the logo of Royal Dutch Shell flies outside the head office in The Hague, Netherlands. The energy company said Wednesday that it has agreed to buy gas producer BG Group for $70 billion. Peter Dejong/AP hide caption

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Parts of the subway system were shut down in the city of Bursa when a major power outage hit cities and provinces across Turkey on Tuesday. Anadolu Agency / Getty Images hide caption

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At Resource Management's materials recovery facility, workers pull plastic bags, other trash and large pieces of cardboard off the conveyor belts before the mixed single-stream recyclables enter the sorting machines. Véronique LaCapra/St. Louis Public Radio hide caption

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A platform owned by Mexico's state-run oil company Pemex is seen off the Bay of Campeche in the Gulf of Mexico. The country has recently opened up its energy sector to foreign investors. Victor Ruiz/Reuters/Landov hide caption

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Renewable energy sources — such as the Eolo wind park about 75 miles south of the Nicaraguan capital, Managua — generate about half of the country's electricity. Officials predict that figure could rise to 80 percent within years. Inti Ocon/AFP/Getty Images hide caption

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Proponents of the terminal plan say it would bring economic development to the Vancouver area, just across the Columbia River from Portland, Ore. Conrad Wilson/OPB News hide caption

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Opponents of fracking protested in January at the inauguration of Pennsylvania Gov. Tom Wolf. Matt Rourke/AP hide caption

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Miller Farm, the terminus of Van Syckel's pipeline, in 1868. The oil was pumped to Miller Farm and then transported by railroad. Drake Well Museum/Courtesy of PHMC hide caption

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An oil well in Garden City, Texas. With prices plunging, oil companies are laying off thousands of workers. Spencer Platt/Getty Images hide caption

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A functioning oil rig sits in front of the capital building in Oklahoma City, Okla. The oil industry is an important employer in the state, but officials are concerned a technique used to dispose of wastewater from oil extraction is behind a surge in earthquakes here. Frank Morris/KCUR hide caption

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