Mold comes in many colors and is a natural part of the environment. It is present everywhere, both indoors and outdoors. There are many types of mold. All of them need water or moisture to grow. When excessive moisture accumulates in buildings or on building materials, mold growth often occurs. Mold growth can occur on wood, carpet, and insulation. Health risks associated with indoor mold growth include sneezing, runny nose, red eyes, skin rashes, dizziness, headaches, and even asthma attacks. These risks are especially harmful to children, elderly people, and those with pre-existing respiratory illnesses.