Molds can be found almost anywhere when moisture is present. Molds create tiny spores to reproduce, just as plants produce seeds. Mold spores float through the indoor and outdoor air continually. When mold spores land on damp places indoors, they may begin growing. For people sensitive to molds, inhaling mold spores can trigger an asthma attack or other respiratory problems. Unfortunately, molds are a naturally occurring part of our environment and only professional testing can differentiate from the thousands of mold types and whether there are toxic amount of molds present in any given environment.