exhaust gas

Exhaust gas is the mixture of pollutants and byproducts released from an engine, typically from vehicles or machinery, when fuel is burned. It contains substances like carbon dioxide, water vapor, nitrogen oxides, carbon monoxide, and unburned hydrocarbons. These gases are expelled through the exhaust system after combustion, and their composition depends on the engine's efficiency and fuel type. Proper management of exhaust gases is important to reduce environmental impact and ensure vehicle safety, often involving emissions control devices like catalytic converters that help clean these gases before they're released into the atmosphere.