The hydrogen fuel cell uses hydrogen and air to generate electricity, producing only heat and water as tailpipe emissions. The reaction occurs across an electrochemical cell similar to a conventional battery cell, causing energy engines used to propel the vehicle forward. Union minister of state for science and technology Dr Jitendra Singhsaid that if a diesel bus is compared to a hydrogen bus, it typically emits 100 tons of co2 per annum on long-distance routes, and there are millions of buses across the country, reports The Times of India. Also, a hydrogen fuel cell truck's operational cost is competitively lower...