Trump gutted emissions reductions. The president must make up for time lost.
The president wants to use pollution rules to rapidly lift sales, but there are hurdles ahead.
The new president has shown a welcome interest in combating climate change. But more will need to be done.
Every carmaker is trying to figure out how to make the leap before governments force it and Tesla and other start-ups lure away drivers.
General Motors said it would no longer back President Trump’s effort to strip California of the power to set fuel economy standards.