Molds are a type of fungus. They grow best in warm, moist environments. They thrive on digesting decaying organic materials. Mold does not use chlorophyll to produce food thats why mold does not need sunlight to survive. Without mold, the entire world would be overrun by dead plant matter, so it's an important part of the environment. Read what the EPA says about the 10 thing you should know about MOLD.