GM proposes nationwide zero-emissions vehicle sales mandate

  • Calif., Governor Jerry Brown, center, blasts a Trump administration plan to freeze vehicle emissions standards, saying it threatens public health and the environment, Friday, Oct. 26, 2018, in Sacramento, Calif. Brown was joined by California Air Resources Board Chairperson Mary Nichols, and Attorney General Xavier Becerra. (AP Photo/Rich Pedroncelli)

DETROIT — General Motors says it will ask the federal government for one national gas mileage standard, including a requirement that a percentage of auto companies’ sales be zero-emissions vehicles.