到目前止，世界上已开始应用的环保汽车有电动汽车、甲醇汽车及液化石油气（天然气）汽车。由于LPGV及NGV比其它汽车更具优越性，它的一氧化碳比之汽油（包括柴油）汽车减少90％以上，氢氧化合物减少约40％，所以LPGV及NGV不仅符合环境保护的要求，而且也是新能源应用的需要。? Until now, the world’s green vehicles that have started to be used include electric vehicles, methanol vehicles and liquefied petroleum gas (natural gas) vehicles. Since LPGV and NGV are superior to other vehicles in that their carbon monoxide is reduced by more than 90% and their oxyhydroxide is reduced by about 40% compared with that of gasoline (including diesel), LPGV and NGV not only meet environmental protection requirements but also are new The need for energy applications. ?