The ventilation filter is not new, it is in most luxury vehicles. My idea is to make a add-on for all vehicles that ethers fits the air intake in front of the vehicle or goes on the vents in the vehicle. If it were manufactured to go in front or under the windshield air intake it would have a charcoal filter that cleans the air and can be injected remotely from inside the vehicle by the user with any fragrant, like roses or a vanilla scent. What ever the driver want to smell, instead of the exhaust from the vehicle in front of him.
Reward: Content Drivers, Safer Drivers