Beijing’s Guotai Chambers building (top) during polluted weather on January 31, 2013, and during clear weather on February 1, 2013. Beijing has seen particulate levels 25 times higher than World Health Organisation (WHO) limits, and the pollution is inflicting a heavy toll on both human health and economic activity.
Beijing's Guotai Chambers building (top) during polluted weather on January 31, and during clear weather on February 1
