The Biden administration will move as soon as Friday to restore California’s authority to set its own, stronger, vehicle emissions standards, according to reports. The transportation sector is the country’s largest source of greenhouse gas pollution, and as the nation’s largest car market California’s vehicle emissions regulations set a de-facto national standard. The Trump administration attempted to revoke California’s ability to set its own vehicle emissions standards, prompting legal challenges brought by 22 states and the District of Columbia. The Biden administration is expected to abandon the defense of the Trump administration’s revocation. (Wall Street Journal $, Politico Pro $)