noun
toxic smoke; toxic fumes; noxious fumes; poisonous gas
Refers to smoke or fumes that are harmful when inhaled, often from fires, chemicals, or industrial sources.
火災現場では毒煙に注意してください。
Be careful of toxic smoke at the fire scene.
工場から出る毒煙が問題になっている。
The toxic fumes from the factory have become a problem.