It's back: Wave of smog hits Beijing
By LI LEI |
China Daily |
Updated: 2018-10-15 09:06
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This pollution will clear on Tuesday, the watchdog said.
China has a six-level air quality rating system. Excellent air requires index levels below 50, and from 151 to 200 or from 201 to 300 are respectively classified as moderately polluted and heavily polluted. Days when the index rises over 300 are considered severely polluted.
