Quote:
Originally Posted by serialk11r
all those diesel trucks roll along the road producing far more NOx than a passenger car ever could
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Diesel trucks are down to 0.2 g/hp-hr, from 1.2 in 2007, 2.5 in 2002, 5.0 in 1994. That's as close to zero that EPA cares about for now. It would be interesting to get an equivalent unit of measure for the automotive side to compare.