Dear Prof. Pradeep,

   Already some initiatives are taken by the Indian government. In 2015, Northern Railways had fitted one coach of the Rewari-Sitapur broad gauge passenger train with solar panels. However, this would be the first DEMU (Diesel Electric Multiple Unit) broad gauge train, in which all coaches have solar panels. Solar panel fitted coaches already run on narrow-gauge trains plying on Pathankot-Jogindernagar route in Kangra Valley section and Kalka-Shimla section.

For more details PFA the link..

http://www.financialexpress.com/economy/indias-first-solar-powered-train-all-you-want-to-know-about-indian-railways-green-initiative/264505/

Dear Prof.

This is recent activity in Indian railways to reduce emission

The first trial run will be conducted in the next three to four days in Jodhpur, NWR Public Relations Officer Gopal Sharma told IndianExpress.com.

The work on one rake of Diesel Electric Multiple Unit (DEMU), which has six coaches, has already been completed by Noida-based firm Jakson Engineers Limited (JEL). The firm was awarded a Rs 1.57-crore contract last October by the Indian Railways Organisation for Alternate Fuels for fitting solar panels on 50 DEMU coaches.

Every coach will be carrying 12 solar panels on the rooftop. The twelve panels, each panel producing 300 Watts in ideal conditions, will be able to generate 3.6 Kilowatts of electricity and supplant the load of 1.5 Kilowatts required to power the CFL lights and fans inside the coaches. All panels will be firmly held by U-channels that are welded to the coach body on the rooftop.

Annually, the Railways are hoping to reduce 239 tonnes of carbon dioxide emissions by saving approximately 90,800 litres of diesel per rake.

http://indianexpress.com/article/india/india-news-india/railways-to-start-trial-runs-of-solar-train-in-sunny-jodhpur-2798717/