other materials within the home that emit unhealthy chemicals
Explanation
While air pollution is thought to be a problem related to outdoor air, the same pollutants can be found indoors. We spend up to 60% of our time indoors and our homes are not always the safe places we would like them to be.
Pollution exposure at home and work is often greater than outdoors. The California Air Resources Board estimates that indoor air pollutant levels are 25-62% greater than outside levels and can pose serious health problems.