The issue of mediocre economy was solved long ago; money's just in the way. Manufacturers know how to make 40,50,60+ mpg cars; there are plenty of them in Europe today, and there were numerous 40+ cars here in the 80s and 90s. Many of them are even made by the same companies present here in the US. We just don't get them here because there's much more money to be made selling large, overpowered, inefficient cars than small, reasonably powered, efficient ones. There's a lot of advertising and psychology that goes into making the F-150 the number one selling vehicle in the US, and Ford, Chevy, et al aren't going to stop marketing and profiting from those kinds of vehicles until they can't afford to keep making them here.
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