Quote:
Originally Posted by Red Bread
cars release a fraction of the total pollutants while being more efficient even on stupid ethanol fuel
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I was reminded of the articles from the 1990's showing that the exhaust coming out of certain PZEV vehicles (Volvo, Subaru are the ones I remember) was cleaner than the air going into the intake, at certain times, on LA freeways. Air quality really has come a long way. ICE efficiency too.