RESIDENTS across huge swathes of northern China are battling through choking pollution at extreme levels, as Beijing was plunged into toxic twilight for the fourth time this winter.
Visibility was reduced to around 200 metres in parts of the capital, where mask-wearing pedestrians groped through a murky haze, despite warnings from authorities to stay indoors unless absolutely necessary.
In a Beijing city office visited by AFP, up to 20 workers worried that the pollutants could penetrate indoors took extra precautions, wearing gas-mask style protective headgear at their desks.
State broadcaster China Central Television gave the smog's second day huge airplay, showing vehicles using full headlights in mid-morning to light their way through the noxious cloud.
More than 100 flights were delayed or cancelled at Zhengzhou Airport in Henan, the television said, adding that the haze would last until Thursday. At Beijing airport, 61 departing flights were delayed in the morning.
In the eastern province of Shandong, almost 2,000 passengers were stranded at Qingdao's main airport after it shut with 20 flights cancelled as visibility dropped to 100 metres, according to the official Xinhua news agency.
The smog of recent days has hit a total area of 1.3 million square kilometres, the Ministry of Environmental Protection said - about twice the size of France.
It described the cities of Beijing, Tianjin, Shijiazhuang and Jinan as "gravely polluted".
The National Meteorological Centre (NMC) announced late on Tuesday that it was introducing a three-tier colour-coded weather warning system to alert the public to the severity of smog, according to Xinhua.
Yellow will indicate moderately smoggy weather, with orange for severe conditions and red for extremely severe levels of smog, the report said.
Beijing's winter of smog has sparked an Internet outcry and anger from state media.
The China Daily reiterated its calls for firm action on Tuesday, directing them at the capital's newly-installed mayor Wang Anshun, who formally took over on Monday.
"What do Beijing residents expect of their new mayor?" asked the newspaper in an editorial. "Of all the things that need improving, cleaner air will be at the top of many people's wish list."
Wang was quoted by Xinhua as saying: "The current environmental problems are worrisome."
The Beijing News went as far as to suggest banning or regulating next month's traditional and hugely popular New Year fireworks in the capital. Pollution readings spiked last year after the city's skyline lit up with explosions.
The toxic air follows an extreme bout of pollution earlier this month, when state media said readings for PM 2.5, particles small enough deeply to penetrate the lungs, peaked at 993 micrograms per cubic metre, almost 40 times the World Health Organization's recommended safe limit.
China's pollution problems are blamed on the country's rapid urbanisation and dramatic economic development.
AFP
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