How does toxic mold make you sick?

It's not just a homeowner's nightmare -- toxic mold can damage your lungs and suppress your immune system. Where does it come from, and what can you do to keep it out of your home?

Prompted by the deaths of the infants in Cleveland in the early '90s, organizations like the national Centers for Disease Control and Prevention and the Environmental Protection Agency have begun to compile… » Full Story on HowStuffWorks