From left, Topher Jones, Edward Hartmann and Angie Holliday hold a campaign sign outside City Hall in Denton, Texas, on July 15, 2014. Voters in the college town approve a ban on fracking on Tuesday.
Tony Gutierrez/AP
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Ray Gerrish repairs a drilling rig near Watford City, N.D. Oil industry analysts predict that oil prices will have to remain low for at least several months before having a significant effect on U.S. production.
Jim Gehrz/MCT/Landov
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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
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Workers drill for oil in the Bakken shale formation outside Watford City, N.D., an area experiencing an oil boom.
Andrew Burton/Getty Images
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Guillermo Gomez, husband of Vilma Marenco, holds his daughter in their home in Northeast Houston. Marenco was killed in April after being hit by an uninsured trucker who ran a red light.
Mayra Beltran/Houston Chronicle
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When Dawn Gioia first received a request to lease mineral rights under her home, in a downtown neighborhood in Brighton, Colo., she thought it was a scam.
Lesley McClurg/Colorado Public Radio
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Lesley McClurg/Colorado Public Radio
A worker stands on top of a storage bin on July 27, 2011, at a drilling operation in Claysville, Pa. The dust is from powder mixed with water for hydraulic fracturing.
Keith Srakocic/AP
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