chimney · noun C /ˈtʃɪm.ni/
chimney
B2 a hollow structure that allows the smoke from a fire inside a building to escape to the air outside
Dictionary example:
Factory chimneys belched dense white smoke into the sky.
Learner example:
The reason is half for my own health and fitness and half for the health of my town, which is polluted by lead, the smoke from chimneys and other artificial poisons. (First Certificate in English; B2; Latvian)