Explanation:

IOC, India’s largest oil firm will build the country’s first ‘green hydrogen’ plant at its refinery in Mathura. This decision has been undertaken with the view of preparing for a future to cater to the growing demands cleaner forms of energy.

=> This project will be the India’s first ever green hydrogen unit.

=> Earlier, ‘grey hydrogen’ production projects have been announced making use of fossil fuels such as natural gas.

=> Several hydrogen production units are being planned to be set up by IOC.

=> With Hydrogen fuel cell powered buses are plying on the road it will be essential to set up hydrogen power plants.