RE: Apartment Hunting: Red flags you should never ignore

Mold is caused by a wet wall or damp areas. For example, if there is a leakage from the toilet upstairs in a building, it will affect the wall of the downstairs, thereby causing mold... mold is those greenish and blackish things you see on walls

This is a picture, you must have seen it somewhere.

Lol yea I am now a landlord with three tenants.