The coaches of Kalka-Shimla toy train — the Himalayan Queen — have been converted to solar- based power system with the aim of harnessing green energy and reducing carbon emission.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/himalayan-queen-now-fully-solar-powered
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-chandigarh
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pathankot
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/unesco
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rail-transport
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/solar-energy
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/himachal-pradesh
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/renewable-energy
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/chandigarh
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/leds