black,grey
The answer depends in part on the color of the smoke.
Depends on the color of the smoke. Blue smoke-oil. Black smoke-unburnt fuel.
Burning oil emits blue smoke. Black smoke is caused by an overly rich fuel mixture. White smoke is coolant entering the combustion chamber.
Could be a diesel? If not then replace your oxygen sensor on your exhaust. A bad oxygen sensor causes the exhaust smoke to be dark in color.
blue smoke can be caused by sticking valves or burnt rings
Carbon based pollution.
Carbon Monoxide
grey exhaust smoke is caused by your engine burning oil during the combustion process. this could be caused by a piston ring that doesnt properly seal, or another leak in your engine.
Because it releases the carbon and buildup in your motor. That has to go somewhere. The exhaust. That smoke is just a lot of carbon buildup from your motor.
The answer is smoke. Smoke is often caused by cars this is by hbw9999
Carbon Monoxide
No, it is composed of mainstream smoke, and sidestream smoke