The Kraus Group identifies its main markets as regions in the world that typically have major pollution problems, or countries where governments hope to exploit natural gas reserves to end their dependence on foreign oil, or to free up internal supplies of oil for sale in foreign hard-currency markets. Liquefied petroleum gas is a better fuel than gasoline because it reaches the engine in pure gas form, resulting in better combustion because it optimizes the gas-combustion mixture. If the LPG system has been installed properly, there is hardly any discharge of carbon monoxide, and compared with petrol and diesel, the exhaust fumes contain less harmful substances. Engine life is extended because of the absence of acids and carbon deposits, and the oil is not diluted. In addition LPG vehicles emit 10 per cent to 25 per cent less carbon monoxide into the atmosphere.
Natural gas is the cleanest -burning, commercially available alternative fuel.
Per unit of energy, natural gas contains less carbon than any other fossil fuel, and thus produces lower carbon dioxide emissions for each vehicle mile travelled. NGVs do emit methane but the increase in methane emissions is more than offset by a substantial reduction in carbon dioxide emissions compared with other fuels. LPG and CNG systems release virtually no evaporative and running-loss emissions because of their sealed fuel systems and negligible refuelling emissions. Hydrogen is widely regarded as the fuel that will change life most in the 21st century. The only by-product of hydrogen combustion is water vapour.