Describe classification of fuel based on physical state and occurance

•  Describe classification of fuel based on physical state and occurrence:
• Fuels can be classified based on their physical state as solids, liquids, or gases.
• Solid fuels include coal, wood, and biomass.
• Liquid fuels include petroleum, diesel, and ethanol.
• Gaseous fuels include natural gas, propane, and hydrogen.
• Fuels can also be classified based on their occurrence as renewable or non-renewable.
• Renewable fuels include biomass, biofuels, and wind and solar power.
• Non-renewable fuels include fossil fuels such as coal, oil, and natural gas.