China government warns northern cities to get serious in war on smog

China government warns northern cities to get serious in war on smog
- Data earlier this month showed only four of 28 northern Chinese cities met their air quality targets in October and air quality in 338 Chinese cities worsened in October, with levels of hazardous breathable particles, known as PM 2.5, up 5.6 percent on the year to an average of 38 micrograms per cubic ...