If you live in an urban area with cars, industry and unpleasant city smells, you might retreat to your house for safety from environmental pollutants. But how good is your air quality at home? The Environmental Protection Agency defines indoor air quality as how the air in and around buildings relates to the health and comfort of said building’s occupants. Indoor air pollutants might cause health effects soon after exposure, or they could show up years later.  Indoor air quality is a global issue. The World Health Organization estimates that every year, 3.8 million people die from harmful indoor air — especially due to fuel and dirty cook stoves. And pregnant women living with indoor air pollution may pass impaired lung function on to their babies. Related: The little bird flips down when you have poor air quality Fortunately, there are some easy fixes for at least certain causes of indoor air pollution . Let’s look at a few easy ways you can optimize your home air quality.…