久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

Global EditionASIA 中文雙語(yǔ)Fran?ais
China
Home / China / Environment

Beijing's PM2.5 air pollution forecast to keep dropping

By Hou Liqiang | China Daily | Updated: 2019-07-10 07:26
Share
Share - WeChat
A view of Tian'anmen Square under the blue sky in Beijing, May 6, 2019. [Photo/IC]

Beijing is expected to see its average density of PM2.5 particulate matter go below 50 micrograms per cubic meter this year and reach the national standard for what's considered safe of 35 micrograms per cubic meter between 2030 to 2035, a senior air pollution control expert said.

He Kebin, an academician of the Chinese Academy of Engineering and dean of Tsinghua University's School of Environment, made the comment on the sideline of the two-day 2019 Beijing International Forum for Metropolitan Clean Air Actions-Clean Air and Climate Change, which concluded on Tuesday.

Beijing made marked progress in air pollution control in the past 20 years, largely as a result of the local government's efforts. The average density of PM2.5 in the capital went down by 31.5 micrograms from 2013, reaching 58 micrograms in 2017. The local government's pollution control efforts contributed 65 percent of the decrease, He told the forum.

He said better management of coal-fired boilers, the shift from bulk coal to cleaner energy forms as a heating source and the upgrading of the industrial structure proved to be the most efficient ways to improve air quality in the capital during that time.

Collaborative efforts of nearby regions and favorable meteorological conditions contributed 23 percent and 12 percent, respectively, to the reduction of PM2.5, he added.

In 2018, the average concentration of PM2.5 in Beijing dropped to 51 micrograms per cubic meter.

As particulate matter falls below 50 micrograms, measures necessary for improving air quality may have to change as different pollutants may emerge as important factors, He said during a media interview.

Beijing's environmental authority reported that the average PM2.5 density in the capital was 46 micrograms per cubic meter during the first six months of this year.

Recent research has shown that formaldehyde, a gas that previously was considered a problem mainly in indoor pollution, now is a bigger concern for outdoors because it contributes to chemical reactions that produce smog. "I think we need to draft a list that includes major formaldehyde emitters that will help set explicit targets for air pollution governance during the next step," he said.

Progress in upgrading energy consumption and collective action in the entire Beijing-Tianjin-Hebei province cluster play an important role in the anticipated further reduction of PM2.5 density in Beijing to the national standard of 35 micrograms per cubic meter between 2030 to 2035, he said.

Yang Bin, vice-mayor of Beijing, said the forum helps with sharing achievements and experiences among regions and cities in tackling air pollution and climate change.

"We need the wisdom of the world's major cities to solve Beijing's ecological and environmental problems, and at the same time, we are willing to share Beijing's story and contribute Beijing's experience to provide a reference for more cities, especially in developing countries," he said, addressing the opening ceremony.

Top
BACK TO THE TOP
English
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: 成人小视频免费 | 国产精品高清免费网站 | 久草社区视频 | 成人看片黄a在线看 | 国产一区亚洲 | 日本乱人伦在线观看免费 | 天堂8中文在线 | 成人影院在线免费观看 | 色一欲一性一乱一区二区三区 | 成人欧美一区二区三区视频 | 欧美成人午夜视频免看 | 韩国成人毛片aaa黄 韩国福利一区 | 国产伦精品一区二区三区精品 | 国厂自拍| 国产精品免费_区二区三区观看 | 欧美精品99 | 国产三级精品久久三级国专区 | 99视频在线精品免费 | 99热碰| 99九九99九九九视频精品 | 久久精品国内一区二区三区 | 国产欧美一区视频在线观看 | 全国男人的天堂天堂网 | 欧美日韩精品国产一区在线 | 天堂视频在线免费观看 | 亚洲欧洲无码一区二区三区 | 久久精品国产精品青草不卡 | 国产成人久久精品麻豆二区 | 在线亚洲精品自拍 | 国产精品一区二区丝瓜 | 亚洲一区二区三区在线视频 | 一级毛片牲交大片 | 国产精品久久久久久久免费大片 | 亚洲男人在线天堂 | 欧美激情特级黄aa毛片 | 日本欧美一级aaaaa毛片 | 欧美一级毛片免费大片 | 欧美亚洲一区二区三区 | 国产99视频精品免费观看9e | 一级一级毛片免费播放 | 久久综合久久久 |