Mold spores can be found in almost every environment as they could enter homes through open vents, ducts, doors, windows, and even through air conditioning systems during air exchange. Mold spores travel in the air so they could be attached to carriers like human skin or clothes, animal fur, or on movable items. When these mold spores fall on places where there is plenty of moisture. For example where there are leakages in roof tops, inside pipelines, wall surfaces, flower pots or flooded areas, they will automatically grow with a little or more moisture. A lot of building materials also provide the needed nutrients to spur mold growth. Some of these materials include wet cellulose, paper products, cardboard; tiles, wood products, wet carpet, etc. These are the right habitats for mold to grow..