Attached in the link is a good article from The Daily Green. The article is about potential contributors to indoor air quality issues in your home.

In addition, any sort of water damage,moisture and condensation could also contribute to biologically related indoor air quality problems as well, such as a musty smell, mold spores and visible growth.

Check it out.

http://www.thedailygreen.com/environmental-news/latest/indoor-air-pollution-47020404