Regular Exercise Has Benefits Of It's Own.

Habitual exercise reduces the risk of death regardless of exposure to air pollution, and air pollution generally increases the risk of death regardless of habitual exercise. Thus, habitual exercise should be promoted as a health improvement strategy, even for people residing in relatively polluted areas.

Both physical inactivity and air pollution have detrimental effects on health. Staying active should not be at the cost of compromised health from air pollution. Addressing both major public health issues, would lead to long-term health benefits for humans and the planet.