The government says it is doing all it can do to ensure supplies. Coal India, the world"s largest coal miner, has increased production by 12%, "strengthening India"s energy security", according to the federal coal ministry. It also despatched 49.7 million metric tonnes of coal to the power generating companies in April, a 15% rise over the same month last year. The railways have cancelled more than a thousand passenger trains to transport more coal to fuel-starved plants.