Hello! :)
I really think it is none of the above since gasoline is really the one that produces the smoke from vehicles such as cars and contributes to air pollution.
Hope this helped!
Good luck!
~ Destiny ^_^
Friction slows things down. For example when you are putting on breaks in a car the friction causes the car to stop because you are putting pressure on the shoe and drum.
Friction goes against applied force works against it causing the object motion to slow down.<span />
Explanation:
Kase katabe mo crush mo hahahaha indee jwk lang
