"We use students’ nose bleeds to test the quality of the running track”

“Exposed to the burning sun, unregulated plastic running tracks emit toxic gases, pouring into my child’s body,” posted one Weibo user. “Every day after school, my child goes to bed first because of a headache. For my child to grow up healthy, I would rather they use an unpaved, dirt playground.”

https://www.yahoo.com/news/beijing-school-running-tracks-being-082614391.html?nhp=1&soc_src=mail&soc_trk=ma