Fungi and mold naturally occur in our environment. In fact, over 100,000 kinds of fungi have been identified.
Fungi produce some very useful results. Yeast is a type of fungi used in preparing breads, baked goods and other food products, including some alcoholic beverages. The unique flavor of blue cheese is a result of mold. An edible mushroom is simply a type of fungi, and lifesaving penicillin is a product of mold (Penicillin chrysogenum).
Even though some forms of mold can add value to our lives, other forms can be harmful. Excessive amounts of mold, different types of mold, and/or exposure to molds may present health concerns for some people.