Final answer:
Pilot lights are crucial for igniting household appliances; combustion pollutants from fuel burning affect indoor air quality; natural gas is a versatile heat source for homes and industries.
Explanation:
Pilot lights are small gas flames that serve as ignition sources for household appliances like water heaters, central heating systems, and kitchen burners. They play a crucial role in initiating combustion processes in these appliances.
Combustion of fuel in appliances like gas stoves, water heaters, and furnaces produces combustion pollutants that include gases and particles, impacting indoor air quality and potentially posing health risks to individuals.
Natural gas is widely used as a source of heat in homes for stoves, hot water, and furnaces, as well as in industrial processes and electricity production, highlighting its versatility and importance.
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