Which of CNG, LPG, LNG is used as fuel?

While CNG is comprised of methane, LPG is comprised of propane and butane. CNG is typically used as a substitute for gasoline in automobiles, while LPG is often used in the industrial, refrigeration, agricultural and catering industries. When LNG is returned to its gaseous state, it is used across the residential, commercial and industrial sectors for purposes as diverse as heating, cooking, generating electricity and manufacturing a wide variety of products. LNG is also used as a fuel for heavy-duty and other vehicles.