Mold is a type of fungus. These small organisms can be black, white, orange, green, or purple and live almost anywhere indoors and outside. Molds thrive on moisture and reproduce through lightweight spores that travel through the air. You’re exposed to mold every day. They’re usually harmless in small amounts. But when they land on a damp spot in your home, they can start to grow. They release spores that you might breathe in. If you’re sensitive to mold and inhale a lot of spores, it could make you sick.(According to WebMD.com)