Some molds are toxic. There are many mold removal services. If you have been injured, there are mold injury attorneys. Many homes require mold removal.

Toxic Mold or Black Toxic Mold is an umbrella term for various types of mold. Stachybotrys chartarum is one of the most common types. Molds release toxins primarily to poison other molds from growing in the area. The human body can tolerate the toxins some molds produce in small quantities, in larger quantities toxic mold can be a danger to human health.

Definition from http://en.wikipedia.org/wiki/Toxic_mold