The One Big, Beautiful Bill Act zeroes out the fines the federal government charged automakers for violating fuel efficiency standards. That could change the kinds of vehicles carmakers build, at least in the short term.

These regulations have changed a lot since the 1970s. Each president has tinkered with them.

For every electric F-150 it sells, it can sell up to 12 gas-powered models and comply with emissions rules. Those rules may be updated.