The full form of CNG is ‘Compressed Natural Gas’. The full form of LPG is ‘Liquified petroleum gas’. A few of the advantages of using CNG and LPG as fuels are listed below;CNG and LPG do not cause pollution. At the time of burning, they release a smokeless flame as they are clean fuels.No ashes are left behind while burning.The handling process is quite easy.For storing purposes, they are convenient.