LPG (liquefied petroleum gas) typically consists of a mixture of propane and butane gases. These gases are naturally occurring and are extracted from natural gas or crude oil. The specific proportions of propane and butane can vary depending on the intended use of the LPG, as well as local regulations and climate conditions. Other components of LPG may include small amounts of ethane, pentane, and other hydrocarbons, as well as additives such as odorants to help detect gas leaks.