Liquefied Petroleum Gas (LPG) is a hydrocarbon gas that is present in liquid form. It is a clear, environmentally friendly, and very effective fuel. LPG comes in two primary forms, propane (C3H8) and butane (C₄H₁₀), and has a wide range of applications, including powering recreational areas, drying crops, cooking on barbecues, heating residences, and more.