Smog in the city.
A dense grey pall shrouds China's capital and many commuters wear masks.
Beijing Residents are no strangers to noxious air pollution. But it seems that there are limits.
Beijing has issued a yellow alert -- the second most serious of four...It's the first time the Environmental Protection Bureau has used its new colour coded warning system unveiled last October.
Smog levels in China's capital city exceeded dangerous highs of 350 on Thursday.
Air pollution readings measuring the number of unhealthy particles in the air higher than 300 are considered hazardous by the World Health Organisation.
(SOUNDBITE)(Mandarin) 25-YEAR-OLD UNEMPLOYED MAN MR. ZHANG SAYING:
"Beijing's air is now like living in a steamer with all sorts of smoke, haze and smog. We've all become human vacuum cleaners"
The excessive pollution levels are expected to continue for three days and people have been warned to reduce outdoor activities, use public t
