Mold Facts Mold is a type of fungus. Other types of fungi include yeasts and mushrooms. Sometimes the term mildew is used. It is also a type of fungus.
Molds reproduce by means of spores which commonly travel through the air.
Mold can look like a smudge, a discoloration, or even a stain. Many smell musty or faintly like alcohol. Mold's most important requirement is a source of moisture. Some varieties of molds are toxic. Mold allergenicity Molds are strong allergens .