Общество с ограниченной ответственностью Издательско-торговая корпорация "Дашков и К". 2018. 411 с.
Natural gas may include heavy hydrocarbons homologues of methane, such as propane, butane and others. These hydrocarbons are also known as liquefied natural gas. LPG can be called the fuel of the future, as it can be used both in domestic applications and as an alternative ecological fuel.