The air quality inside a car is often worse than the air quality outside, and there are several reasons for this:

  1. Recirculation of Pollutants:
    • Cars take in emissions from surrounding vehicles and recirculate them within the cabin.
    • Because vehicles are not built to be completely airtight, pollutants can enter the car through air vents and other openings.
  2. Higher Concentrations of Pollutants:
    • Roadway concentrations of vehicle-related pollutants are typically several times higher than ambient (outdoor) concentrations.
    • Levels of some pollutants and toxic compounds can be nine to twelve times higher inside vehicles than alongside the road.
  3. Composition of Vehicle Exhaust:
    • Vehicle exhaust contains dangerous pollutants, including:
      • Nitrogen dioxide (NO₂): A harsh-smelling gas that can cause breathing problems, lung irritation, and lower resistance to respiratory infections.
      • Ozone (O₃): Toxic at ground level, it is a major lung irritant and a component of smog.
      • Carbon monoxide (CO): A colorless, odorless, poisonous gas that can cause dizziness, fatigue, and confusion.
  4. Increased Time Spent in Cars:
    • Globally, time spent on the road is increasing due to factors like urbanization and traffic congestion.
    • As traffic worsens, both vehicle interior and outdoor pollution concentrations rise.

In summary, the air inside a car is worse due to pollutant recirculation, higher concentrations, and the composition of vehicle exhaust. It’s essential to maintain good air quality inside your vehicle for your health and well-being