China pollution: Factories closed by Beijing smog

Levels of PM2.5, the smallest and deadliest smog particles, rose as high as 303 micrograms a cubic metre in some parts of Beijing on Saturday, and could top 500 in coming days - more than 20 times the level considered safe by the World Health Organization.




Read More: http://www.bbc.com/news/world-asia-china-35141188