Beijing Lifts Air Pollution Red Alert
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The Environmental Protection authorities in Beijing have lifted the second red alert for air pollution this year.

The alert was issued last weekend as the Chinese capital was forecast to experience a new bout of choking smog, with the air pollution expected to stay at the most hazardous level for at least 4 days.

China has a four-tier warning system, with red as its most severe level, followed by orange, yellow and blue.

Despite the lifting of the alert, many citizens said they didn't feel that the air quality today had improved much at all.

Wang Bin, an official from the Beijing Municipal Environmental Protection Bureau, explained why the red alert was lifted ahead of time.

"We predicted on Tuesday that the air quality next day would improve gradually from north to south. That's why we lifted the red alert in advance so as to help the citizens to arrange their working or leisure plans better and more reasonably."

Experts have also found that although the air quality improved somewhat in the first half of this year, the pollution level rebounded even more sharply in November and December.

Zhang Dawei, head of Beijing Municipal Environmental Monitoring Center, said the air quality forecast could be affected by a variety of factors.

"The forecast of air quality is very complicated and technical. Its results are based on not only the weather forecast, but also the pollutant discharge situation. The factors affecting the results include both physical ones and chemical ones. "

Beijing was hit with severe air pollution on Tuesday. Municipal Environmental Monitoring Center forecast the density of PM2.5 may exceed 500 micrograms per cubic meter on that day.

Meanwhile, China's northern Hebei Province and the port city of Tianjin also issued their first-ever air pollution red alerts on Tuesday.

Hebei, which is home to six of the ten most polluted Chinese cities in November, also issued its first red alert for smog Tuesday noon.

Author： 　　　Source：xinhua　　　 Editor：Yang Fan