This is off-topic, but I'm a railfan. Here's a nice advertisement from CSX Rail.
"What can a car that gets 50 miles to the gallon do for the environment? Not nearly as much as the car that's carrying it. Our trains can carry a ton of freight 423 miles on one gallon of fuel."
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Presumably that weight/distance/fuel volume is once the train has finished accelerating for an optimally loaded engine. Not to knock rail, I think its a lot better when its available, but that figure seems somehow dishonest.