Solar panels are mounted on the roof of the Los Angeles Convention Center on September 5. The state's governor has signed a landmark bill setting a goal of 100 percent clean energy for the state's electrical needs, by the year 2045.
Mario Tama/Getty Images
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.
Warning signs adorn the fence surrounding the compound housing the Hornsdale Power Reserve, featuring the world's largest lithium ion battery made by Tesla, during the official launch near Jamestown, Australia, on Friday.
Solar cells sit in the sun at the Desert Sunlight Solar Farm in Desert Center, Calif. The people who run California's electric grid expect the solar power output to be cut roughly in half during the eclipse.
Marcus Yam/LA Times via Getty Images
Jayme Orrack oversees Xcel Energy's new wind farm in Courtenay, N.D. The wind farm started generating electricity late last year with 100 turbines that collectively generate 200 megawatts of electricity.
Amy Sisk/Prairie Public Broadcasting
Kevin Butt, Toyota's regional environmental sustainability director, at a facility that uses methane to generate clean electricity to help run Toyota's auto plant in central Kentucky.
The Noor I Concentrated Solar Power plant, shown on Thursday, is the first phase of a large solar thermal power plant that is intended to supply more than a million Moroccans with electricity.
Fadel Senna/AFP/Getty Images
"Solar trees," which suspend solar panels over parking spaces in San Diego, collect electricity. Generating solar power like this is just one rung on a ladder the city will have to climb to reach 100 percent renewable energy by 2035.
Clare Trageser /KPBS
Onlookers come to admire the self-proclaimed "Miracle on 34th Street" in the Baltimore neighborhood of Hampden. But not every country has as much electricity as America does.