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(NEWSER) – If you already find it annoying to be forced to stop at a red light, we have unfortunate news for you: It's also bad for your health. A study out of the UK's University of Surrey and published in Atmospheric Environment finds that when drivers are stopped at a traffic light, they are being exposed to harmful nanoparticles emitted from vehicles; these pollutants are known to factor into heart and respiratory diseases.

Researchers found that while a driver spends just 2% of his or her total driving time at signal-controlled intersections, that amount of time accounts for 25% of total exposure to such particles while in the car, per a press release. Researchers note that pedestrians should be wary of crossing intersections for the same reason.

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