The chemical reaction that occurs during combustion involves the rapid reaction of a fuel (usually a hydrocarbon) with an oxidizing agent, often oxygen, producing heat and light. The general formula for a combustion reaction is: Fuel + O₂ → CO₂ + H₂O + Energy. Complete combustion results in carbon dioxide and water as products, while incomplete combustion can yield carbon monoxide and soot. Combustion reactions are fundamental in energy production for transportation, heating, and electricity generation, but they also contribute to environmental issues such as air pollution and greenhouse gas emissions.