2) The Bathroom
The damp environment of the bathroom is the perfect environment for mold to grow. Mold can cause allergic reactions and asthma. On top of that, you can also inhale chlorine when you have a hot shower, putting you more at risk for asthma, bronchitis, fatigue, and even certain types of cancer. You may want to install a filtered shower head for more protection, and leave the bathroom door open to allow it to dry.