POST TIME:2017-12-19 | AUTHOR:ISAO
Beijing saw more Good Air days. "Good air" days are those when the daily concentration of PM2.5－airborne particles of 2.5 microns in diameter or smaller that are harmful to health－is below 75 micrograms per cubic meter, while "severely polluted" is higher than 150 mcg per cum.
From the year of 2013, the number of good air days has been increasing. Beijing experienced 12 more blue-sky days last year compared with 2015 and saw a 9.9 percent drop in the average daily concentration of PM2.5, according to data released on Tuesday, when the capital was again shrouded in thick smog. The city had 198 "good air" days, while the number of "severely polluted" days fell by seven to 39 in 2016. And this year till now Beijing has had more than 230 good air days.
Beijing is positioned as the national cultural and educational center of China as it has been China' political center. Battling with air pollution has been a task that has to finish for Beijing authority and with decades of efforts, the blue sky and good air have returned. Once they returned, they will stay.
Reference: China Daily. http://www.chinadaily.com.cn/china/2017-01/04/content_27853288.htm