What are five common fuels used to generate heat?

Five common fuels used to generate heat include natural gas, propane, oil, coal, and wood. Natural gas is widely used in residential heating and cooking due to its efficiency and lower emissions. Propane is often used in areas without natural gas access, while oil is commonly used in heating oil systems. Coal and wood are traditional fuels, with coal being less popular due to environmental concerns, and wood often used in stoves and fireplaces for both heating and ambiance.