Sumber : http://www.nbcnews.com/news/china/366-china-s-cities-don-t-have-safe-air-greenpeace-n500261
Jan 20 2016, 10:31 am ET - 366 of China's Cities Don't Have Safe Air: Greenpeace
by Ed Flanagan
BEIJING — Air quality across China generally improved last year but remains a "major health hazard," according to Greenpeace.
A new report ranking 366 of the country's cities in terms of air pollution highlighted that there was still plenty of room for improvement.
"None of these 366 cities meet the World Health Organization's air quality standard," said Dong Liansai, a climate and energy campaigner for Greenpeace. "That is to say 100 percent of Chinese cities studied fail to meet the WHO's standard."
Image : A woman wearing a mask rides her bicycle near Tiananmen Square during a "red alert" for pollution in Beijing on Dec. 21, 2015. WANG ZHAO / AFP - Getty Images file
Annual average levels of PM2.5 — particulate matter of 2.5 micrometers in diameter that can penetrate deep into the lungs — dropped by 10.3 percent last year compared with 2014 in the surveyed cities, Greenpeace said in its report released on Wednesday.
However, air quality in the Beijing area, Yangtze River Delta area and Pearl River Delta area showed significant improvement.
Despite such good news, the Greenpeace report showed China's national average for PM2.5 concentration was 50.2 parts per cubic meter — well in excess of WHO's guideline of an annual average of less than 10 micrograms.
"Air quality across China is still a major health hazard," Dong added.
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