‘I needed an IV’: shoes melt as turf temperature reaches 157F in Eagles-Titans game
(www.theguardian.com)
Idk, at 150 degrees, the rubber could be off gassing and they'd be breathing that in while on the ground. Stadiums could also concentrate that gas on the field since there are walls around at least 2 sides, 4 if its a professional field.
Tires are the #1 producer of microplatics, which is where my original idea came from. Although they arent running at 70 mph, so it might not produce as much as a car