Black mold

Black mold in our houses and schools can pose a serious health risk if it develops.  This article describes a little about the problem:

http://www.essortment.com/black-mold-46777.html

and with the recent hurricane and flooding in America, this following CDC report also gives insight:

http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5508a1.htm