Date of Release:
Dec 19 2015
China's weather observatory on Saturday issued a yellow alert for smog in the country's north that will linger until Wednesday.
The major pollutant will be PM2.5 -- harmful microscopic particles that can penetrate deep into lungs.
During the investigation into the smog last week, officials found that heavy and chemical industries were the main contributors to the heavy air pollution in north China.
CRI's Qian Shanming has more.
Chen Guoqi at the Ministry of Environmental Protection is in charge of air quality monitoring in north China.