I visited a playground made of some kind of rubber mulch, maybe chippered tires. The sun was out in force (hot summer day, 10k ft). You could see the haze of ch

I visited a playground made of some kind of rubber mulch, maybe chippered tires. The sun was out in force (hot summer day, 10k ft). You could see the haze of chemicals hovering over the chips as they offgassed, as well as smell them.