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

itoggle caption Frank Morris/KCUR

Elizabeth Ebinger in Maplewood, N.J., bought her solar panels, while neighbor Tim Roebuck signed a 20-year lease. Both are happy with the approach they took, and both are saving money on energy bills. Jeff Brady/NPR hide caption

itoggle caption Jeff Brady/NPR

Tracy Perryman is production manager for his family's small oil company in Luling, Texas. B.J.P. Inc. owns 116 wells that, combined, produce about 100 barrels a day. John Burnett/NPR hide caption

itoggle caption John Burnett/NPR

Casa Dominique is an ecolodge on Lanzarote's northern coast. Julie Genicot, a French trekking guide, has lived in Lanzarote since her grandparents opened the Casa Dominique when she was a child. She worries that offshore oil drilling might ruin the natural environment she grew up in. Lauren Frayer/NPR hide caption

itoggle caption Lauren Frayer/NPR

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

itoggle caption Andrew Cullen/Reuters/Landov

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

itoggle caption Jim Gehrz/MCT/Landov

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

Lynn Good has had many mentors throughout her career — but few of them were women. "So I'm generationally on the early part of the ascent of women into leadership roles," the Duke Energy president and CEO says. Pat Sullivan/AP hide caption

itoggle caption Pat Sullivan/AP

A fireball goes up at the site of an oil train derailment in Casselton, N.D., in this Dec. 30 photo. The fiery crash left an ominous cloud over the town and led some residents to evacuate. Bruce Crummy/AP hide caption

itoggle caption Bruce Crummy/AP

A woman in Senegal charges her cellphone using a port in her solar-powered LED lantern. Bruno Déméocq/Courtesy of Lighting Africa hide caption

itoggle caption Bruno Déméocq/Courtesy of Lighting Africa

In Del Norte, Colo., Public Works Supervisor Kevin Larimore shows off solar panels that provide electricity for the town's water supply. Despite generating its own solar energy, the town is still at risk of a blackout if its main power line goes down. Dan Boyce/Inside Energy hide caption

itoggle caption Dan Boyce/Inside Energy

The National Ignition Facility's 192 laser beams focus onto a tiny target. LLNL hide caption

itoggle caption LLNL

An air-monitoring station near the TVA Kingston Fossil Plant in Kingston, Tenn. Stations such as this one are used to monitor clean-air compliance of TVA coal-fired plants. Wade Payne/AP hide caption

itoggle caption Wade Payne/AP

We face real-world decisions now about everything from sea level rise, to energy infrastructure to what food is best for you. Karen Bleier/AFP/Getty Images hide caption

itoggle caption Karen Bleier/AFP/Getty Images

Wind generators at Pacific Hydro's Cape Bridgewater wind farm in Warrnambool, Australia, in May 2012. Each generator produces roughly enough energy to meet the annual needs of 12,000 households. Mark Dadswell/Getty Images hide caption

itoggle caption Mark Dadswell/Getty Images