The air in our cities is polluted so the air in your home is polluted. In fact, many things in your home add to that pollution. The chemicals we use to clean, the dirt and grime that is track in, and even the furnishings can add to that pollution.
This is a link to an article that suggests that we use plants to can improve the air quality.
Here is another link to 20 plants that improve indoor air quality.
Why not use these plants to decorate your home and improve the air quality?