Stuck in gridlock, we often curse fellow drivers and lament the inevitable delay. But did you know traffic jams pose a serious health risk from air pollution? Researchers at the University of Surrey found that keeping windows closed and ventilation off during jams reduces exposure to toxic fumes by 76%.
To reach this conclusion, the team tested five scenarios: windows open or closed, ventilation on, off, or partial, and air conditioning on (hot or cold) or off. In traffic, open windows or AC on deliver pollution levels equivalent to walking outdoors. Closing windows and turning off ventilation slashed exposure by 76%. Need AC? "Set your car to recirculate interior air," advises study leader Dr. Prashant Kumar. This blocks external pollutants from entering the cabin. He also recommends keeping ample distance from the vehicle ahead to avoid trapping fumes in congestion.
The World Health Organization lists air pollution among the top 10 global health threats, blaming it for 7 million premature deaths yearly—worse in cities. Last year, these Surrey experts showed drivers at red lights face 40% more pollution than in free-flowing traffic.
