Healthy Homes - Indoor air quality can suffer when homes are shut up tight and built with the wrong materials. Few people realize that the indoors of a typical North American home can have up to ten times worse air quality than outdoor air on a bad smog day in the city. We can make it better or worse depending on how we outfit our homes and what we use to maintain them. In this section we look at the concerns and provide some ideas to help you make your home much healthier.