LPG stands for Liquefied Petroleum Gas. LPG consists of carbon and hydrogen in major form of Propane (C3H8) and Butane (C4H10). This mixture is called under name Liquefied Petroleum Gas (LPG).
At normal temperature and pressure condition, LPG exists at gas form. LPG is compressed under high pressure for more convenient in transportation and storage. LPG is one of the clearest fuels nowadays and is used widely in civilization, commerce and agricultural production.