The five — Ford, Honda, BMW, Volkswagen and Volvo — sealed a binding agreement with California to follow the state’s stricter tailpipe emissions rules.
Several states have filed suit against President Trump's efforts to loosen efficiency standards for vehicles. The states claim public health concerns could arise.
Former President Obama on Tuesday urged voters to "demand better" of the government after the Trump administration rolled back a key Obama-era fuel standard intended to combat climate change.
