To carry out more environmentally friendly society, electric vehicles[EVs] and hydrogen fueled vehicles[FCVs] have drawn a lot of attention in the automotive industry. That's why hybrid electric cars and EVs have recently been increasing. On the flip side, natural gas vehicles[NGV] are also one of environmentally friendly vehicles, but it seems like they are having trouble expanding at least in Japan. I came across interesting article about this issue online and would like to share it with everyone here. NGVs use fuels called liquefied petroleum gas[LPG] and compressed natural gas[CNG]. These gases emit less carbon oxides[CO2] than petroleum and coals when combusting them. Thanks to this nature, they can contribute to prevent the global warming. On top of that, they also have some upsides which is capable of stable supply and have relatively stable prices. So, NGVs' environmental performance and economical one are very attractive options for us. In Japan's case, most of LPG cars are for taxi and commercial vehicles, and most of CNG cars are for bases and trucks. However, the expansion of NGVs has some downsides. One of them is short of charging stations. As of the end of 2022, the number of gas stations in Japan is about 25,000 and one of natural gas stations is about 300. It is very few. Another is very expensive price tag, which is twice than conventional vehicles with gasoline engine and diesel one because NGVs need to compress gases and store them. These problems are the exact same as EVs. As far as I'm concerned, I suppose NGVs has more benefits than EVs if those issues are solved. Because NGVs might take much less time to charge.