Liquefied natural gas (LNG) is natural gas that has been cooled to a liquid state, at about -260° Fahrenheit, for transportation and storage. The volume of natural gas in the liquid state is about 600 times smaller than the volume in the gaseous state. This process, developed in the 19th century, allows natural gas to be transported to places not reached by pipelines and used as a transportation fuel.
Where natural gas pipelines are not feasible or do not exist, natural gas liquefaction is a way to move natural gas from producing regions to markets, for example, to and from the United States and countries in Asia or Europe. Asian countries combined account for most of the world's LNG imports.
For technical reasons the vehicles that use LNG as fuel are the larger and heavier ones such as tractor-trucks, ships or even trains. It does not seem likely that LNG vehicles will be evolved with technically simpler alternatives such as Compressed Natural Gas (CNG) or Liquefied LPG