Carmakers in the United States have been eager to help advance the EV agenda in the past half a decade or so. Ford, GM, and all the European and Japanese majors have poured billions into a whole new lineup of all-electric vehicles in anticipation of mass adoption. Now, they're hitting the brakes. In July last year, the Environmental Protection Agency proposed new, tighter fuel efficiency standards aimed at encouraging greater EV adoption. The proposal was to lift fuel efficiency requirements from 49 miles per gallon to 58 miles per gallon on a…
