He has long blamed efficiency regulations for his frustrations with things like toilets and showerheads. And they aren’t just getting more expensive to buy; cars are getting more expensive to own. And Trump’s agenda of suddenly rolling back efficiency rules has simultaneously made it harder for many industries to do business while raising costs for ordinary Americans. President Barack Obama tightened vehicle efficiency and pollution standards. And all that uncertainty is making cars more expensive to buy and run, with even more expensive long-term consequences for people’s health and the environment.