Why is it that no air quality comparisons are ever available to back up any of these claims?
It's like the speed limit debate - 'if we lower the limit to 40 we can cut down on pollution' said all the activists speaking in favor at the public hearings.
Then why has my fuel economy gone down the drain? At last check, I'm now sucking back a hair under 15L of 91 oct fuel per 100km of city driving. Engineered gridlock isn't helping with emissions.