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With EPA suit, California leads battle over fuel-economy standards

Traffic on the Golden Gate Bridge
The Golden Gate Bridge. Photo: Justin Sullivan via Getty Images

The EPA signaled last month that it would make good on a longstanding promise to roll back Obama-era vehicle fuel-economy standards, a historic bargain struck between the Obama administration, the auto industry and the state of California in 2010.

Why it matters: In response, California and 16 other states (plus the District of Columbia) fired a first shot across the bow on Tuesday, challenging the April announcement in court. This lawsuit portends a protracted legal fight over the future of the country's fuel-economy standards and the ability of states to set their own.