Exhaust fumes are the harmful gases emitted from the engine of a vehicle or machinery. These gases contain pollutants that contribute to air pollution and affect the health of humans and the environment. The term 'exhaust fumes' can be replaced by different synonyms such as exhaust gases, emissions, exhaust smoke, exhaust vapors, engine fumes, combustion byproducts, and engine exhaust. All these synonyms refer to the same thing; the gases expelled from an internal combustion engine. It is crucial that we monitor and reduce the amount of exhaust fumes emitted to improve air quality and safeguard public health.