Traditional Culture Encyclopedia - Photography and portraiture - What is this big chimney for?

What is this big chimney for?

It is used to smoke in power plants.

Function: When the indoor temperature is higher than the outdoor temperature, the indoor hot air naturally rises along these vertical channels due to its low density, and penetrates from the high-rise part through the cracks in doors and windows and various holes, while the outdoor cold air infiltrates and supplements from the low-rise part due to its high density, forming a chimney.