The Environmental Protection Agency (EPA) is putting in place new fuel economy rules for passenger cars and light trucks that are the strictest yet, even more than the standards set during the Obama administration. They come as the result of an executive order from President Joe Biden in January and undo President Donald Trump’s rollback of EPA regulations. Starting in 2023, automakers will be required to build all light-duty vehicles to emit 5 to 10 percent less CO2 emissions per mile than was previously required, according to the new rule released on Dec. 20. This will increase the vehicles’ average miles per gallon to about 40 mpg by 2026. This standard replaces the EPA rule put in place in 2020 under Trump, which only required a 1.5 percent increase in America’s fuel economy through 2026. “The final rule for light duty vehicles reflects core principles of this Administration,” EPA Administrator Michael …