Heavy Smog Envelopes China

BEIJING, CHINA – FEBRUARY 24: (CHINA OUT) People wearing masks walk on Danbi Bridge at the Temple of Heaven Park on February 24, 2014, in Beijing, China. Altogether 1.43 million sq km of China’s land territory, nearly 15 percent of the total, have been covered by persistent smog in recent days, according to news report. (Photo by ChinaFotoPress/Getty Images)