www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

USEUROPEAFRICAASIA 中文雙語Fran?ais
China
Home / China / Environment

Beijing in 2016 saw more 'good air' days

By ZHENG JINRAN | China Daily | Updated: 2017-01-04 07:17

Official concedes improvement 'not huge enough' yet

Beijing in 2016 saw more 'good air' days

Beijing experienced 12 more blue-sky days last year compared with 2015 and saw a 9.9 percent drop in the average daily concentration of PM2.5, according to data released on Tuesday, when the capital was again shrouded in thick smog.

The city had 198 "good air" days, while the number of "severely polluted" days fell by seven to 39, Zhang Dawei, director of pollution monitoring for the Beijing Environmental Protection Bureau, said at a news conference.

"Good air" days are those when the daily concentration of PM2.5-airborne particles of 2.5 microns in diameter or smaller that are harmful to health-is below 75 micrograms per cubic meter, while "severely polluted" is higher than 150 mcg per cum.

The average level was 73 mcg per cum, down by 9.9 percent year-on-year, although that was still more than double the national standard set by the State Council.

The bureau's report said the reduction could be attributed to the government's strict controls on coal consumption, the phasing out of polluting vehicles and companies, and strengthened pollution monitoring.

Fang Li, the bureau's director, previously said the capital would take tough measures to cut the average level of PM2.5 to 60 in 2017.

Beijing in 2016 saw more 'good air' days

The Temple of Heaven in Beijing is seen in this picture on Dec 29, 2016. [Photo/IC]

Meanwhile, Beijing experienced another bout of severe air pollution that started on Friday, prompting authorities to issue an orange alert-the second-highest level in a four-tier emergency response system. The smog was forecast to remain until Sunday.

Despite the data indicating an overall improvement in air quality, many Beijing residents were not convinced.

Li Xinying, 45, a stay-at-home mother, said she has had a severe cough during the New Year holiday, which she blamed on the worsened air quality. "It felt like we had more smoggy days in 2016 than in 2015," she said.

Yu Jianhua, the Beijing environmental bureau's chief engineer, conceded that the improvements made last year were "not huge enough" to change residents' perception of overall air quality.

Xie Shaodong, a professor of environmental sciences at Peking University, said that while the government's data is authentic, he understood why many people might believe little progress has been made. "When the PM2.5 concentration is higher than 35 mcg per cu m, any increase or reduction in concentration will make little difference in terms of visibility," he said.

Even if the PM2.5 reading fell from 100 to 50, visibility would in most cases stay below 15 kilometers, he said. "But if the reading is lower than 35, the reduction of every microgram per cubic meter would improve the visibility largely."

Xie said this is based on theories, widely agreed upon among global environmental experts, linking PM2.5 and visibility.

Editor's picks
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
 
主站蜘蛛池模板: 在线免费观看一区二区三区 | 美女毛片在线看 | 国产在线精品二区韩国演艺界 | 九九欧美| 中文字幕日韩三级 | a级在线观看视频 | 高清欧美性xxxx成熟 | 日本久久久久一级毛片 | 亚洲专区在线视频 | 亚洲美女视频在线 | 亚洲成人免费视频 | 欧美一区二区三区视视频 | 成人午夜兔费观看网站 | 日本人成在线视频免费播放 | 久久久久欧美精品网站 | 亚洲男人的天堂久久精品 | 国产精品19p | 亚洲欧美一区二区三区久本道 | 亚洲制服欧美自拍另类 | 国产呦系列呦交 | 毛片免费全部免费观看 | 亚洲精品网址 | 伊人青| 久久99亚洲精品久久久久 | 三级网站国产 | 国产欧美日韩一区二区三区 | 国产精品午夜免费观看网站 | 欧美成人艳星在线播放 | 99久久精品免费视频 | 黄色欧美网站 | 国产精品一区在线免费观看 | 欧美日本道免费一区二区三区 | 久久精品免看国产成 | 成人午夜做爰视频免费看 | 精品午夜寂寞黄网站在线 | 国产小毛片 | 日本美女视频韩国视频网站免费 | 九九精品久久久久久噜噜 | a级国产乱理伦片在线观看国 | 国产精品外围在线观看 | 久久久国产一区二区三区 |