Excerpt from EPA Care for Your Air: A Guide to Indoor Air Quality Booklet:
Most of us spend much of our time indoors. The air that we breathe in our homes, in schools and in our offices can put us at risk for health problems. Some pollutants can be chemicals, gases, and living organisms like mold and pests.
Several sources of air pollution are in homes, schools, and offices. Some pollutants cause health problems such as sore eyes, burning in the nose and throat, headaches, or fatigue. Other pollutants cause or worsen allergies, respiratory illnesses (such as asthma), heart disease, cancer, and other serious long-term conditions. Sometimes individual pollutants at high concentrations, such as carbon monoxide, cause death.
Some pollutants in the air are especially harmful for children, elderly people, and those with health problems.
Important tips that will help control indoor pollutants
Test for radon and fix if there is a problem.
Reduce asthma triggers such as mold and dust mites.
Do not let people smoke indoors.
Keep all areas clean and dry. Clean up any mold and get rid of excess water or moisture.
Always ventilate when using products that can release pollutants into the air, if products must be stored following use, make sure to close tightly.
Inspect fuel-burning appliances regularly for leaks, and make repairs when necessary.