LNG is the liquid form of natural gas, which is a gaseous mixture of simple hydrocarbon compounds usually found deep in underground reservoirs formed by porous rock. The main ingredient in natural gas is methane, along with minor amounts of other gases. When LNG is made from natural gas, any traces of other gases, as well as liquid hydrocarbons and water are removed.
LNG is turned into a liquid by being cooled to -162 degrees Celsius. This cooling process reduces the volume of natural gas more than 600 times making it easier and safer to store and transport. Every year, millions of metric tons of LNG is transported through deep sea shipments. There are hundreds of LNG carriers worldwide operating in the shipment of LNG.