Exhaust gas意思

"Exhaust gas" refers to the gases that are emitted as a result of the combustion process in an engine, such as a car engine or an industrial furnace. These gases are produced when fuel is burned in the presence of oxygen, and typically include carbon dioxide, water vapor, nitrogen, and small amounts of other substances such as carbon monoxide, nitrogen oxides, and various organic compounds.

The composition of exhaust gases can vary depending on the type of fuel being burned and the operating conditions of the engine or furnace. In the case of car engines, exhaust gases are emitted through the exhaust system and can contribute to air pollution if not properly controlled. To reduce the environmental impact of exhaust gases, many vehicles are equipped with emission control devices such as catalytic converters, which help to convert harmful pollutants into less harmful substances before they are released into the atmosphere.