**Abstract**

Decarbonising of transport, industrial and all sectors of economy is a necessity to stop or reverse global warming. Use of batteries, fuel-cells, hybrid topographies with smaller IC engines and use of alternative fuels like methanol, ethanol, DME in the IC engines are some of the ways through which emission of green-house gases can reduced/eliminated. Diesel engines are highly efficient due to higher compression ratios and are used in the heavy-duty transportation vehicles. DME is a single molecule fuel having high cetane number and which can be used as a drop-in fuel on the diesel engines albeit with retro-fitment of these engines with a new pressurized fuel system. DME with a chemical formula CH3-O-CH3 can be produced by different feedstocks such as coal, natural gas, biomass and bio-waste and municipal solid waste. India has a large reserve of high ash coal and generates high quantities of biomass and MSW, all of which can be converted to DME by use of clean production technologies. India's transport and industrial sectors consume about 100 billion liters of diesel fuel per year produced entirely from imported petroleum. This amount of diesel can be replaced by indigenously produced DME from locally available coal, biomass and MSW.

**Keywords:** diesel, petroleum, DME, engine, fuel injection equipment, coal, biomass, gasification, decarbonising
