That's fine, but doesn't solve point 2, and doesn't take into account the "social" costs of car-dedicated community infrastructure. Of course, these costs are

That's fine, but doesn't solve point 2, and doesn't take into account the "social" costs of car-dedicated community infrastructure. Of course, these costs are really not "social" at all, as easily observed by reviewing the impact on surrounding neighborhood small businesses and property values in areas where inner-city freeways were erected in the 50s-70s, and then torn down again in the 90s or 00s. If you're interested in the pure social costs, there's always the increase of crime, in-cohesive communities, etc. Cars aren't going anywhere, but that doesn't mean we should always optimize for them above all other concerns, though I agree that we should use more efficient (and less polluting) vehicles. This is a bit off-topic on a discussion regarding second hand smoke -- my apologies.