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空气污染

随着中国北部地区频繁出现雾霾天气,这一现象引发了社会对大气污染的关注。

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This picture taken on January 12, 2013 shows sun light being reflected in a window of a building in Beijing. Dense smog shrouded Beijing on January 12, with pollution at hazardous levels for a second day and residents advised to stay indoors, state media said. AFP PHOTO / WANG ZHAO (Photo credit should read WANG ZHAO/AFP/Getty Images)
An employee changes a price label at a supermarket in Wuhan, Hubei province March 9, 2012. China's annual inflation cooled sharply to a 20-month low of 3.2 percent in February as food price pressures eased after the Lunar New Year holiday, giving Beijing room to loosen monetary policy if needed. REUTERS/Stringer (CHINA - Tags: BUSINESS FOOD) CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA
A resident plays with a diabolo in a park during a heavily hazy winter day in Beijing January 12, 2013. Thick fog and haze shrouded central and northern parts of China on Friday, with Hebei and Henan provinces among the most polluted areas, monitoring data showed. REUTERS/Suzie Wong (CHINA - Tags: ENVIRONMENT HEALTH SOCIETY TPX IMAGES OF THE DAY)
A hazy nightview is taken in severe smog in Beijing, China, 12 January 2013. Beijing was hit by its worst smog in almost a year. Exacerbated by heavy fog, the dense, choking smog that had blanketed the capital for the better part of the past fortnight plunged to a new low yesterday morning. Although the capital is often hit by smog in winter, the past two weeks have seen one of the longest stretches of smoggy days in Beijing in years. Pollution readings, including those for the smog-inducing fine particles known as PM2.5, from the local environmental watchdog and the US embassy were well in severely polluted or hazardous levels for most of Thursday night and Friday morning.
A young boy looks back while being carried by a man in front of the main hall of the 'Temple of Heaven' which is barely visible due to heavy smog in Beijing, China, 19 January 2012. The Beijing government said it will soon release stricter air pollution limits according to reports by local media, after citizens' complaints over heavy pollution which health authorities indicate lowers life expectancy by at least five years. EPA/DIEGO AZUBEL +++(c) dpa - Bildfunk+++
A masked cyclist rides her electric bike on a road in heavy fog in Jinan city, east Chinas Shandong province, 6 December 2011. A government proposal for a tighter system of monitoring pollution nationwide, including using a PM2.5 measure of microscopic airborne particles, has won support from a majority of the public, the Ministry of Environmental Protection said Wednesday (7 December 2011). The new standard would require air-quality watchdogs to monitor airborne particles, those measuring less than 2.5 microns in diameter, and publish the findings.
A demonstrator holds a "No more Fukushima" sign during a rally, protesting against restarting the Ohi nuclear power plant's reactors in front of the prime minister's official residence in Tokyo, Saturday, June 16, 2012. Japan moved closer to restarting the nuclear reactors for the first time since last year's earthquake and tsunami led to a nationwide shutdown. The March 11, 2011 disaster caused radiation leaks at the Fukushima Dai-ichi plant. (Foto:Itsuo Inouye/AP/dapd)