Often called Mildew, is caused by fungi.
Mold is everywhere, inside buildings, houses and outdoors.
They spread by spores that travel through the air. Molds sole purpose is to help break down organic matter. There is more than 100,000 species of mold worldwide. Mold is most commonly found where there is dampness, high humidity or decay. The common indoor hideout for mold is in basements and bathrooms.