This is an interesting (and short) editorial from the Boston Herald on the potential for natural gas to be used by trains - and the environmental benefits obtained with that use. It starts: "Environmentalists notoriously fret about — and many work to prevent — the surging production of natural gas by hydraulic fracturing ('fracking') of deep shale formations. Meanwhile, they are ignoring the huge environmental benefits from the availability of abundant cheap natural gas." Brings a smile to your face, doesn't it ...