北京的冬天很难捱,有时坐在出租车上,从三环看出去,不远处的高楼湮没在灰蒙蒙的雾霾中,只剩一个海市蜃楼般的轮廓。因为抽烟,我很少会真的担忧雾霾对我造成危害,那是2013年末,上海空气污染最严重的冬天。有一天走在北京街头,我忽然觉得胸闷、窒息,像是一件尺码过小的衬衫被扣上了最后一颗扣子。同事群里疯传一个消息,当天PM2.5指数破2000,超过1952年伦敦的水平。晚上八点,另一则笑话占领了朋友圈,有人说, Beijing’s winter is difficult to endure, sometimes sitting in a taxi, seen from the Third Ring Road, not far from the towering haze in the gray haze, leaving only a mirage-like silhouette. Because of smoking, I seldom really worry about the harmful effects of smog on me. That is the winter when the air pollution in Shanghai was the most serious in late 2013. One day walking in the streets of Beijing, I suddenly felt chest tightness, suffocation, such as a small size shirt was buttoned the last button. Co-worker group crazy pass a message, the same day the PM2.5 index broke 2000, more than 1952 London level. At eight o’clock in the evening, another joke occupied the circle of friends, some people say,