Consumer advocates took to the streets of Phoenix recently to protest against an Arizona utility's efforts to bill customers using a so-called "demand charge." If approved, Arizona Public Service would be the first utility in the country to place most of its residential customers on that kind of rate plan. Will Stone/KJZZ hide caption

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Uber But For Energy: Utility Surge Pricing Threatens Summer Cool

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A new study finds people who are well-hydrated have lower body weights and lower odds of obesity. Klaus Vedfelt/Getty Images hide caption

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Thirsty? New Study Links Good Hydration To Slimmer Waistlines

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Not In My Landfill: Georgia Residents Fight Plan To Store Toxic Coal Ash

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Logger Greg Hemmerich and his crew feed low-value trees into a wood chipper, before bringing the chips to ReEnergy Holdings' biomass plant in Lyonsdale, N.Y. David Sommerstein/NCPR hide caption

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Is Burning Trees Still Green? Some Experts Now Question Biomass

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'The New York Times' Investigates An Ailing Clean Coal Project

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Herman "Dub" Tolbert, shown inside an American Legion post in Bokoshe, Okla., says the community is left exposed and he's determined to make regulators listen. Joe Wertz/StateImpact Oklahoma hide caption

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Communities Uneasy As Utilities Look For Places To Store Coal Ash

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Eric Frumin (right) stands in front of his solar panels on the roof of his Brooklyn home alongside architect David Cunningham (left) and AeonSolar's Allen Frishman (center). Courtesy of Eric Frumin hide caption

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Solar Impulse 2, piloted by Swiss pilot Bertrand Piccard, prepares to land in Seville, Spain, on Thursday. Jean Revillard/AP hide caption

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'Beautiful Flight' Across The Atlantic Is Major Milestone For Solar Plane

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California To Close State's Last Nuclear Power Plant

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One of the sites for the Department of Energy's Strategic Petroleum Reserve lies within salt caverns 2,000 feet below the ground near Freeport, Texas. Jeff Brady/NPR hide caption

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Low Oil Prices Fuel Reconsideration Of Petroleum Reserves

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The Solar Impulse 2, piloted by Bertrand Piccard, takes off from John F. Kennedy International Airport in New York on Monday, starting a four-day journey to Southern Spain. Jean Revillard/AP hide caption

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Tommy Chreene with his horse, Lady, at home in Meaux, La. Chreene spent 26 years working on offshore oil rigs in the Gulf of Mexico. While working on the Ursa project, he was part of a program designed to get the workers to open up emotionally with one another. Edmund D. Fountain for NPR hide caption

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On some sunny, spring days, California has more electricity than it can use, like from this solar farm in Fresno. Terry O'Rourke/NREL hide caption

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Who's In Charge? Getting Western States To Agree On Sharing Renewable Energy

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A contractor prepares to cut off the top of a coal bed methane well near Gillette, Wyo., in 2015. It's one of thousands of abandoned, plugged wells sprinkled throughout Wyoming and Colorado. Stephanie Joyce/Wyoming Public Media hide caption

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Danger Below? New Properties Hide Abandoned Oil And Gas Wells

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U.S. Energy Secretary Ernest Moniz takes part in a press conference at the end of the 2015 meeting of the International Energy Agency Governing Board on Nov. 18, 2015 in Paris. ERIC PIERMONT/AFP/Getty Images hide caption

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Energy Secretary Ernest Moniz Says Government Can Help Clean Energy Innovation

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Platform Check: How Trump's Energy Plan Stacks Up To The Democrats

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