Watch 1,200 Miles In 156 Seconds, Using Less Juice : Take a ride on the backbone of America's infrastructure--freight trains--as they carry a supply of OJ from Florida to New Jersey. (Co.Exist, 2/18/13))

According to the Association of American Railroads, freight trains are four times more fuel efficient than trucks, with 75% fewer carbon emissions for the same distance (it has a handy calculator here, if you want to plug in a few actual journeys). The video above shows off some new diesel locomotives that General Electric says are particularly efficient, using "11% less fuel than the existing locomotive average in North America."