Thick clouds emanate from a coal-burning power plant in Baishan, in the Jilin province of China. In an effort to boost its economy, China has recently started greenlighting coal projects that had been on hold.
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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.
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Gas is pumped into vehicles at a BP gas station in Hoboken, N.J. in 2016.The Obama administration moved to nearly double fuel-economy standards by 2025, but the EPA now is moving to weaken them.
A natural gas drilling rig's lights shimmer in the evening light near Silt, Colo. Methane is the main component of natural gas, and studies show some methane escapes from leaky oil and gas operations.
A wind farm in Montezuma Hills, about 40 miles northeast of San Francisco. California is considering proposals to, among other things, derive half the state's electricity from renewable sources.