We often rely on our casement windows when we want fresh air indoors. Though ventilation is a good thing, not all homeowners take advantage of it. It could be due to how the home isn’t set up to remove any existing pollutants. Not letting the structure “breathe” worsens indoor air quality. The air, in fact, is much worse than the air outside, and it can lead to several health issues. This article explains more about this problem.