“楼房9层~11层是扬灰层”这个说法,起源于2003年一篇《售楼小姐真情自白》的网文,这篇文章以“揭秘”的口吻说:“不要以为高层中的9层~11层楼不错,这些楼层正好是扬灰层,脏空气到这个高度就会停顿。”这个说法流传开来,使人真假莫辨。带着这个问题,我们分别咨询了几个专家,他们是这样说的:四川省环境监测总站副站长罗彬:所谓的扬灰主要就是颗粒物 “The 9th floor of the building to the 11th floor is the gray layer ” this view, originated in 2003 a “sales lady truth confession” of the web, this article to “Secret” tone: “Do not That the 9th floor to 11th floor of the high-rise well, these floors are just ash layer, the dirty air to this height will pause. ”This statement spread, so that people should not distinguish between true and false. With this question, we consulted a few experts respectively, they said: Luo Bin, deputy chief of Sichuan Province Environmental Monitoring Station: the so-called ash is the main particulate matter