India, July 23 -- Hydrogen trains may prove invaluable on remote, non-electrified routes where overhead power lines are impractical, but they are no substitute for renewable electricity. The real challenge lies not in building hydrogen trains, but in ensuring that the entire ecosystem powering them is as green as the technology promises

India's first hydrogen-powered passenger train, flagged off by our PM a few days ago on the Jind-Sonipat route, is supposed to be marching its way towards carbon-neutral Indian Railways and eventually a carbon-neutral country by 2070. The only fuel the train engine uses is hydrogen and no other fossil fuel. Hydrogen is used to generate electricity on board that energises the movement of the train. Water v...