Mold is part of the natural environment. Outdoors, mold plays an important part in nature by breaking down dead organic matters such as fallen leaves and dead trees. But indoors, mold growth should be avoided.
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.
It is tough to eliminate all mold and mold spores in the indoor environment. However, mold growth can be reduced by controlling moisture indoors.