Gas prices are expected to increase during summer months, but a recent OPEC decision could bring prices down as soon as this fall. Gerry Broome/AP hide caption

Entering the control room at Three Mile Island Unit 1 is like stepping back in time. Except for a few digital screens and new counters, much of the equipment is original to 1974, when the plant began generating electricity. Jeff Brady/NPR hide caption

Oil operations like this one on Alaska's North Slope are designed for freezing conditions. But as the permafrost thaws, companies are creating new products to help the industry cope. Mark Thiessen/AP hide caption

Coal stockpiled at a power plant. A draft plan circulating in Washington would require power grid operators to buy electricity from struggling coal plants over the next two years to prevent them from shutting down. Reid Frazier/Allegheny Front hide caption

Environmental Protection Agency Administrator Scott Pruitt announcing his decision in April to scrap Obama administration fuel economy standards. Andrew Harnik/AP hide caption

President Trump speaking at the "Unleashing American Energy" event at the Department of Energy in June 2017. Trump said he wants to reorient toward "American energy dominance." Susan Walsh/AP hide caption

Luminalt solar installers Pam Quan (right) and Walter Morales (left) install solar panels on a roof in San Francisco on Wednesday. The California Energy Commission approved a regulation that would require all new homes in the state to have solar panels. Justin Sullivan/Getty Images hide caption

Gas stations display the price of gasoline in Englewood, N.J., on April 30. Seth Wenig/AP hide caption

An artist's rendering shows the reactor's core is about the size of a paper towel roll and could provide a decade's worth of electricity to future missions. NASA hide caption

The Akademik Lomonosov, which the Russian energy company Rosatom calls "the world's only floating nuclear power unit," left port on Saturday. Rosatom hide caption

West Delta 105 E is an oil-producing platform located a dozen miles off the Louisiana coast in the Gulf of Mexico. A 2014 explosion on the lower deck killed Jerrel "Bubba" Hancock. Bureau of Safety and Environmental Enforcement hide caption

In the control room of PJM Interconnection, employees monitor a power grid that stretches across the Midwest and Mid-Atlantic. PJM Interconnection hide caption