General Motors, Fiat Chrysler, Toyota and many others in the auto industry are siding with the Trump administration in a lawsuit over whether California has the right to set its own greenhouse gas emissions and fuel economy standards.

California sued Friday to stop the Trump administration from revoking its authority to set greenhouse gas emission and fuel economy standards for cars and trucks, enlisting help from 22 other states in a battle that will shape a key component...

WASHINGTON (AP) — The Trump administration is poised to revoke California's authority to set auto mileage standards, asserting that only the federal government has the power to regulate greenhouse gas emissions and fuel economy.

New vehicles in the U. S. from the 2017 model year averaged slightly better gas mileage than the previous year, rising to a record 24. 9 mpg, according to an annual report from the Environmental Protection Agency. But the mileage...

President Donald Trump's decision to re-examine Obama-era rules that govern automobile gas mileage could be the first round of a potentially bruising political fight: revoking the ability of California and other Democratic-leaning states to set their own,