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"They have (little) pollution controls"
Train engines have little pollution controls as compared to highway trucks and it's a gap that gets bigger and bigger every year or two with the government piling on more and more emission controls.
What's the governments way of making trucks green?
Hey let's put this EGR thing on these trucks and it'll make them run a lot hotter and burn this bad stuff off.
So how do they make them burn excessively hot? Why by using up crazy amounts of diesel fuel now and again to clean out the new fandangled particulate filter they come with. Yes because refining diesel doesn't pollute??
\rant off
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