A botanist walks through the Pine Flatwoods of Big Cypress Preserve in December 2012. The preserve is home to several oil wells, but a proposed seismic study — being fought by environmentalists — could dramatically increase exploration. Tim Chapman/MCT/Landov hide caption

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Elephants are an option for the first quiz question. These pachyderms are walking on a path at the Lewa Wildlife Conservancy at the foot of Mount Kenya, approximately 185 miles north of Nairobi. Tony Karumba /AFP/Getty Images hide caption

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Gary Matli, a field supervisor with the Oklahoma Corporation Commission, inspects a disposal well located east of Guthrie, Okla. Joe Wertz/StateImpact Oklahoma hide caption

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Bill Pentak of Panda Power Funds (left), Plant Manager John Martin (center) and Construction Manager Rob Risher (right) stand in front of the construction site for the new Panda Liberty gas power plant in Towanda, Penn. The plant, expected to come online in early 2016, was deliberately sited on top of the Marcellus Shale to take advantage of the cheap, abundant gas. Marie Cusick/WITF hide caption

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At an October protest, hundreds of "We Are Seneca Lake" members block the gates of Crestwood Midstream to protest against the expansion of fracked gas storage in the Finger Lakes. PR Newswire/AP hide caption

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Pump jacks and wells work in an oil field on the Monterey Shale formation in California. Economist Michael Porter says that hydraulic fracturing, or fracking, is a "game changer" for the U.S. economy. David McNew/Getty Images hide caption

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Workers use perforating tools to create fractures in rock. An EPA study finds that "fracking" to reach and extract deep pockets of hydrocarbons has not caused widespread drinking water pollution. Brennan Linsley/AP hide caption

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Austin Holland, research seismologist at the Oklahoma Geological Survey, gestures to a chart of Oklahoma earthquakes in June 2014 as he talks about recent earthquake activity at his offices at the University of Oklahoma in Norman, Okla. The state had three times as many earthquakes as California last year. Sue Ogrocki/AP hide caption

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Interior Secretary Sally Jewell speaks in Anchorage, Alaska. The Obama administration is requiring companies that drill for oil and natural gas on federal lands to disclose chemicals used in hydraulic fracturing operations. Dan Joling/AP 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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Opponents of fracking protested in January at the inauguration of Pennsylvania Gov. Tom Wolf. Matt Rourke/AP 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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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 hide caption

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