According to the Indoor Air Quality Association, breathing air in your car's cabin is worse than walking down the street breathing in exhaust fumes in smoggy town. In addition to the "new car smell" that has already been heavily reported on as a possible cause of cancer, vehicle's aren't doing such a great job at filtering the car's exhaust fumes out of the air that enters the cabin. Air conditioner filters and opening your windows can help, but the organization says that prolonged exposure can cause cancer and respiratory disease.

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