Beijing's air quality reached hazardous levels Thursday, as a large sandstorm swept through the Chinese capital, turning the sky a murky yellow and forcing many residents to keep indoors.
원문출처 : http://www.cnn.com/2017/05/04/asia/beijing-sand-storm-pollution-beyond-index/index.html
원문출처 : http://www.cnn.com/2017/05/04/asia/beijing-sand-storm-pollution-beyond-index/index.html