Answer :
Final answer:
Combustion is a vital process involving burning fuel to release energy, utilized in electricity generation, vehicle propulsion, and impacting climate and air quality.
Explanation:
Combustion is the process of burning a fuel-air mixture to transform the energy in the fuel to high-temperature gas, which then powers various applications. In fuel ignition, the fuel-air mixture is ignited to kickstart the combustion process, releasing energy in the form of heat and generating products like water and carbon dioxide. This process is crucial in both generating electricity and powering vehicles, but it also contributes to climate change and urban air pollution.
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