The air you breathe directly affects how you feel. There are plenty of air purifiers on the market but not many of them are portable.
The Airbubbl Airlabs Car Air Purifier is designed to clean the air in your car. It has an activated nano carbon filter to remote 95% of No2 and other pollutants.
The app lets you control the purifier and view stats. It is available for iOS/Android devices.