The lowest gas prices in years are seen Wednesday on a fuel sign in Lawrence, Kan. A day later, OPEC decided to maintain current production levels, virtually ensuring continued low prices at the pump. Orlin Wagner/AP hide caption

itoggle caption Orlin Wagner/AP

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

itoggle caption Richard Vogel/AP

The cost of a gallon of gas kept rising last year, but not at the torrid pace of 2010 and 2011. That helped keep inflation in check. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images

Motorcyclists Hanna Gilan, right, and her son Chaim Gilan fill up their Vespa scooters with less than two gallons at a gas station in the Echo Park district of Los Angeles on Oct. 4, 2012. Damian Dovarganes/AP hide caption

itoggle caption Damian Dovarganes/AP

President Bush and then-Democratic presidential nominee John Kerry shake hands at the end of a presidential debate in 2004 in St. Louis. Researchers want to better understand why partisans' views of the facts change in light of their political loyalties. Charlie Reidel/AP hide caption

itoggle caption Charlie Reidel/AP

President Obama announces support for building an oil pipeline from Oklahoma to Texas, Thursday in Cushing, Okla. Tom Pennington/Getty Images hide caption

itoggle caption Tom Pennington/Getty Images

A driver pumps gas into his Toyota Prius hybrid at a gas station in Sunnyvale, Calif., in 2007. Paul Sakuma/AP hide caption

itoggle caption Paul Sakuma/AP

How big a role do U.S. presidents really play in controlling gas prices? Prices were well over $4 a gallon in La Jolla, Calif. on March 8. Mike Blake /Reuters /Landov hide caption

itoggle caption Mike Blake /Reuters /Landov