China's air pollution is one of the worst in the world: - leader in sulfur emissions - second largest producer of greenhouse gases - China ranks 94 out of 133 countries listed in the Environmental Performance Index (Yale University). 70% of Chinese monitored cities are moderately to severely polluted (they don't meet the World Health Organization Air Quality Standards). 33% of urban dwellers breathe toxic air, equivalent to smoking two packs of cigarettes a day. More on http://www.erenlai.com/index.php?aid=566&lan=3