USE of Bio-CNG will help in smart CITIES of the future - with the bus providing an effective SOLUTION for wet garbage management. The 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. Tata 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.