exhaust fumes; exhaust gas
Refers to the gaseous emissions from vehicles, factories, or engines. Often used in environmental or health contexts.
Exhaust fumes are one of the causes of air pollution.
This car produces little exhaust gas.
A lot of exhaust fumes are coming out of the old car.
The government is promoting measures to reduce exhaust emissions.
Exhaust emission regulations are getting stricter every year in this country.