There is an estimated 300,000 different species of mold/fungi in existence, the US alone being home to over 1000 different species. Molds, unlike plants, cannot create their own food. The environment they inhabit is their source of food. They secrete digestive enzymes to break down both organic and inorganic materials. Molds can be found almost anywhere. They can grow on virtually any organic substance, as long as moisture and oxygen are present. There are molds that can grow on wood, paper, carpet, foods and insulation. When excessive moisture accumulates in buildings or on building materials, mold growth will often occur, particularly if the moisture problem remains undiscovered or unaddressed. Molds reproduce by releasing spores that are undetectable by the human eye. Mold spores are carried through the indoor and outdoor air constantly. When these spores find their home on a damp or wet surface, they begin growing and reproducing. For survival, molds will begin to digest most surfaces they land on, slowly destroying whatever material it inhabits.