most likely, too much fuel.
Heat, unburned gasses, carbon soot.
The emission output at tail pipe can be used to check causes of little air or too much fuel. The emission output can check the levels of water vapor, sulfur dioxide, hydrogen and particulate carbon soot.
Unburnt fuel
Soot, as in chimneys, is just ashes. The word is majivu, the same as produced by by a cigarette, fireplace, or a pipe. CORRECTION: Soot = masizi Ashes = majivu
not goot
burning oil
Your in a high condensation area and it has collected in your exhaust system and causes old mufflers and exhaust system to rust.
aerosols and soot from air polution
Yes they have them.
Flomasters
Explain what it is doing! is water coming out of the tail pipe? do you see white smoke coming out of the tail pipe?
Black soot in the tailpipe typically indicates incomplete combustion of fuel in the engine, leading to the formation of carbon deposits that are expelled through the exhaust system. This could be caused by issues such as a clogged air filter, malfunctioning fuel injectors, or a problem with the ignition system. It is best to have a mechanic inspect and diagnose the issue to prevent further damage to the engine.