visual proof of how bad Beijing air is http://ww1.sinaimg.cn/mw690/4aa0c35bjw1e0quzqeexrj.jpg http://ww1.sinaimg.cn/mw690/4aa0c35bjw1e0quzqeexrj.jpg credit to

visual proof of how bad Beijing air is http://ww1.sinaimg.cn/mw690/4aa0c35bjw1e0quzqeexrj.jpg http://ww1.sinaimg.cn/mw690/4aa0c35bjw1e0quzqeexrj.jpg credit to the author on the watermark.