Fossil Fuels

Fossil fuels are natural energy sources formed from the remains of ancient plants and animals that were buried and compressed over millions of years.

• Common examples: coal, oil (petroleum), and natural gas.
• These fuels are rich in carbon and hydrogen, which release large amounts of energy when burned in Combustion Engines.
• The burning process releases carbon dioxide (CO₂), returning stored carbon to the atmosphere.

• Fossil fuels are nonrenewable resources — once used, they take millions of years to form again.
• Their use has powered human civilization but also contributes to global warming and air pollution.