The proposal to freeze fuel efficiency standards have dealt those efforts another setback
States can claim some success in decarbonizing the power sector. As for limiting tailpipe emissions? They’ve barely managed to move the needle.
That’s one reason climate advocates are concerned about EPA’s proposal to freeze fuel economy standards at 2020 levels through 2026. Where states have considerable authority to influence the power sector, by setting renewable portfolio standards or pushing for emissions reductions from power plants, they have far fewer tools to manage transportation emissions.
And what tools they do have often remain untouched for want of political will.