How often we breathe fresh air

While we express our love and excitement to a certain season, how often do we really go out and breath fresh air? My observation is that the majority of people expose themselves to fresh air is the time when they park their cars on the street. I also think the amount of fresh air is even less during working days given the work schedule. Statistics show that 90% of people don't walk any time in a year more than 150m from a paved road. This shows that some people might never had a chance to breath fresh air in their entire life. While we all get bombarded by the benefits of healthy food and drinks in all sorts of media, we never hear anything about healthy air; perhaps we may when someone can sell one. We all know how dependent we are on air more than anything. I am sure that fresh air has significant benefits on us.