Running on science – air pollution 1 Published on August 15, 2020 in Every Breath You Take: Air Pollution and ExerciseFull resolution (1200 × 1132) Next > Warmer winds aloft act as a roof, trapping air pollution near the ground which is further exacerbated by mountain-valley topographic offsets. Image: Roguevalleycleanair.org/links-and-resources/inversion-layer.html