[Lynn]

All good points. No doubt the breed would have continued to improve. However, most improvements were to ride, handling and power. If car A handles and performs just as well as car B, but car B costs more ONLY because it burns cleaner, not very many of your average consumers are going to pay extra for car B. Just saying without some mandates, we wouldn't be nearly as clean as we are, because there is no "supply and demand" incentive. The comment on the carbs was simply hyperbole.