In this photograph taken on July 18, 2017 Indian commuters walk past the 1600 HP solar-powered DEMU (diesel electrical multiple unit) train is seen parked at Sarai Rohilla railway station in New Delhi. India has added solar panels to the roof of a train in a national first as it tries to reduce its massive carbon footprint and modernise its vast colonial-era rail network. The lighting, fans and information displays inside the train -- once powered by diesel -- will run off the sun's energy after the panels were fitted to the carriage. / AFP PHOTO / CHANDAN KHANNA / TO GO WITH 'INDIA-TRANSPORT-RAIL-CLIMATE-WARMING' BY ABHAYA. (Photo credit should read CHANDAN KHANNA/AFP/Getty Images)
