The correct answer is TATA.India's first bio-methane bus launched by Tata Motors that runs on food waste.?Tata Motors has developed India's first bio-methane bus that runs on food waste! Bio-methane is produced out of bio-degradable materials like kitchen waste.According to Tata Motors, the use of Bio-CNG will help in smart cities of the future - with the bus providing an effective solution for wet garbage management. ?Additional InformationThe bio-methane gas, which is generated as a result of the natural degradation process is a new way of making engines future-ready and environment friendly.A bio-CNG bus is said to be more efficient than a normal CNG bus for the simple fact that in the case of the latter, heavier hydrocarbons also co-exist with the Methane gas.Important PointsTata Motors has, in the past, introduced technologies in CNG engines like long-life spark plugs, sequential gas injection technology, plug type coils, skip fire, and longer oil drain intervals.