Order of the Supreme Court of India in the matter of M. C. Mehta Vs Union of India & Others dated 23/07/2018 regarding plans to combat air pollution in Delhi. It has been submitted by the Amicus that it is possible to have buses with a mix of Hydrogen and CNG. She says that the IOCL has tried this technology and it has proved to be successful. Counsel appearing on behalf of SIAM says that it may not be very difficult to have Hydrogen – CNG mix fuel buses on the road but he will also like to take detailed instructions in this regard. Notice issued to Indian Oil Corporation Ltd. / Ministry of Petroleum and Natural Gas.