Of course, mathematically, if they were to increase CAFE standards by 10% across the board, that would only be about 1% of the total worlds yearly oil usage, which of course will do nothing. Not that I would ever accuse the hypocritical left of understanding basic mathematics, but it really is a meaningless gesture.
Of course it will increase the cost of automobiles, which will harm domestic auto more than imports. Leave it to the left to sink us to 3rd world status as quickly as possible.