Condensation
nothing
It is called carbon dioxide emissions.
because it puts out carbon from burning fuel,
they didn't contain carbon and the by product of burning are carbon dioxide and water but can be used by electrolysis of water
The most important source of carbon entering atmosphere is industries. Living things, burning fossil fuels and automobiles are other sources of carbon dioxide.
Carbon dioxide and water vapor
Carbon monoxide.
The black gunk that comes out of the exhaust pipe when starting the car is probably carbon buildup within the exhaust system. Carbon buildup happens when the engine is not burning fuel as efficiently as it can.
carbon dioxide
Carbon dioxide is the primary gas emitted in automobile exhaust. The other is water vapor (oxidation of the hydrogen from long chain hydrocarbons). CO, or carbon monoxide, is also a minor component of automobile exhaust, and can be particularly lethal if allowed to concentrate in an enclosed area.
Cutting a tree is a physical change. To release the carbon, there has to be a chemical change. Burning or rotting will release the carbon.
Any burning process release carbon dioxide.