Summary | Authorities began to monitor and publish PM2.5 levels
in 2013. The PM2.5 reading in 2013 was on average 89.5
micrograms per cubic meter. By comparison, the national
standard stands at 35 micrograms per cubic meter. PM2.5 was
found to be the major pollutant - ing for 77.8 percent - on
most smoggy days. Southern Beijing saw much higher PM2.5 ...
in 2013. The PM2.5 reading in 2013 was on average 89.5
micrograms per cubic meter. By comparison, the national
standard stands at 35 micrograms per cubic meter. PM2.5 was
found to be the major pollutant - ing for 77.8 percent - on
most smoggy days. Southern Beijing saw much higher PM2.5 ...
en.ce.cn | 08 December 2014