With every stride we take along trails, roads or tracks, we inhale the air. For runners, being able to explore the outdoors, fill our lungs and oxygenate our blood is essential if we want to keep putting one foot in front of the other. But air pollution is causing huge social, environmental, health and economic impacts throughout the world. The World Health Organisation says that air pollution is the largest environmental threat to human health. But now, runners around the globe are supportin...
