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Xavier Becerra, attorney general of California. Photo: Diego M. Radzinschi/ALM[/caption] California Attorney General Xavier Becerra on Tuesday announced a challenge against the U.S. Environmental Protection Agency to protect a waiver that allows the state's regulators to implement stricter fuel-efficiency standards for automobiles than the federal government. EPA Administrator Scott Pruitt last month announced that the EPA was rolling back an Obama-era plan to nearly double federal fuel efficiency standards by 2025 to about 50 miles per gallon. At the time, the EPA said that California's waiver to implement its own standards was being reexamined. Seventeen states and the District of Columbia filed the petition Tuesday in the U.S. Court of Appeals for the D.C. Circuit. Read the petition below: [falcon-embed src="embed_1"]