Heavy smog envelops Beijing
epa03530662 A view of a busy highway as heavy smog engulfs the city of Beijing, China 11 January 2013. Thick smog envelops the Chinese capital 11 January where air quality is rated as ‘hazardous’ with a PM2.5 fine-particle pollutants reading of 434 and ozone level of 456 at 8a.m., Beijing time according to air pollution readings by monitors installed in the US embassy. EPA/HOW HWEE YOUNG