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In response to
"You think car companies would not increase efficiency unless it was mandated?"
by
colin
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They have little incentive to do it. It costs money to create the additional efficiency that they don't see the benefit of. Maybe they would try out
Posted by
pmb (aka pmb)
Apr 30 '13, 12:41
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a smaller car with higher fuel efficiency to create a new market, but small cars generally have not been that popular.
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