Some molds are more hazardous than others Molds that produce mycotoxins, such as Stachybotrys and Trichoderma , present a greater hazard than common allergenic molds like Cladosporium and Alternaria . Health effects will vary with the specific toxin, the concentration in the air and the age and general health of the patient. A dehumidifier will keep the humidity in the air low, but if it is not cleaned frequently, it can become a source of mold contamination itself. Any significant areas of mold growth found inside a building should be removed, not just killed, by trained individuals wearing proper protective clothing and equipment. The larger the area, the more caution is required.
Molds are useful organisms.
Together with bacteria, they are responsible for breaking down organic matter. They are among the principal micro-organisms involved in biodeterioration, which gives us compost and many other useful things. Molds make up 25 percent of the biomass of the earth. Molds have been causing humans grief since time began. The book of Genesis actually gives instructions as to how mold growth indoors should be handled and controlled.