The mold is black and covers large areas of the cement walls. The corners are almost solid black. We placed an office chair we weren’t using in the basement about a month ago when we first moved in; the fabric seat and back of the chair have since grown a greenish, fuzzy-looking mold. I don’t want to store anything else in the basement until I can figure out a way to either get rid of the mold or make sure it doesn’t grow on everything! I also do not wish to waste an entire basement’s worth of storage space. The space does not have good ventilation and this is a house we are renting. Any advice?