BEIJING - FEB 28: severe air pollution in Beijing city center on February 28, 2013 in Beijing, China. Beijing has an alarming level of air pollution (AQI >500), one of the highest in the world.
Editorial use only
Editorial credit: Hung Chung Chih / Shutterstock.com

Royalty-free stock photo ID: 274612160

BEIJING - FEB 28: severe air pollution in Beijing city center on February 28, 2013 in Beijing, China. Beijing has an alarming level of air pollution (AQI >500), one of the highest in the world.