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they are all composed of matter
Automobiles don't need the air bags, people inside the vehicle do. The air bags help people survive bad accidents.
automobiles
factories
Joe Facciolo
The A.O. Smith company is a top supplier of electrical products for automobiles. They manufacture hermetic motors for air conditioning that are used in automobiles.
nothing
Condensation
They get dirty and restrict the air flow.
In addition to automobiles airplanes are a big contributor to air pollution. Burning fossil fuels (coal, oil and natural gas) to generate electricity is also a massive contributor to air pollution.
Because they had no air vehicles or automobiles.
clean air act