Many students in many kindergartens and primary schools in Beijing have nosebleeds, dizziness, cough, rashes, etc. Parents are anxious and the public is angry. All this pointed directly to the newly built plastic runway on campus, which still smelled bad. The plastic runway said [I am wronged] The plastic runway has a history of more than 50 years since 1961, when Minnesota Mining and Manufacturing Company (said [3M] Company you all know) laid a 200-meter-long horse racing runway. In 1968, the plastic runway was officially adopted in the Olympic Games and was positioned as one of the necessary conditions for international competitions. Human beings have set new records and challenged the limits on the plastic runway again and again. And Read More …