Train pushed as eco-friendlier option—and environmentalists are conceding the point
                                
                                
                                    (Newser) -
                                    Often maligned as noxious-fume-spewing bad citizens, railroad companies are hopping the green train, the Wall Street Journal reports. Campaigns by Norfolk Southern and CSX tout clean-burning diesel engines that "can move a ton of freight 423 miles on a single gallon," and Union Pacific claims diverting 25% of...