Dec. 3 - Smog in northeast China disrupts traffic and delays flights while cold front approaches. Rough Cut (no reporter narration).
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Smog disrupted traffic and caused flight delays in northeast China on Tuesday (December 3), Chinese state media reported.
In Harbin, a frigid northeastern city of 11 million people, smog reduced visibility levels to less than 50 metres (164 feet), state broadcaster CCTV said.
Buildings in Harbin were shrouded in thick fog.
The speed limit on express highways surrounding Harbin was tightened to 40 kilometres per hour (24.85 miles per hour), state-run news agency Xinhua said.
The local Harbin Taiping International Airport confirmed that a significant number of flights had been delayed early Tuesday morning due to the smog.
An index that measures PM2.5, or particulate matter with a diameter of 2.5 micrometers (PM2.5), reached 378 on Tuesday, local media reported.
A level above 300 is considered hazardous, while the World Health Organisation recommends a daily level of no more than 20.