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 / China

Regional efforts may not fix air pollution

By Wu Wencong | China Daily | Updated: 2013-03-05 07:53

System is still at an early stage, says expert

With the public counting on regional joint prevention and control to solve the problem of airborne pollution, an environmental expert says the system is still in the early stages and may not cure the problem.

At the annual two sessions, Bao Jingling, a deputy to the National People's Congress for Tianjin, and chief engineer of the municipality's environmental protection bureau, said media and the public should distinguish between the prevention and control of fine particles from the prevention and control of smog and haze.

"A regional joint prevention and control system serves the purpose of curbing regular emissions from pollution sources in cities and provinces within the region, thus lowering the yearly average level of the region's fine particles," Bao said.

But he said such a system cannot help prevent smog and haze.

Dense smog and haze covered large areas of China five times in January, affecting an area of more than 1.4 million square kilometers. Beijing, Tianjin and Hebei province was one of the most severely suffered areas, and also one of the 13 key regions ordered by the Environmental Protection Ministry in September to break with administrative boundaries in the fight against PM 2.5.

PM 2.5 is particulate matter smaller than 2.5 microns that can enter people's lungs and bloodstreams, poisoning them.

In a list of the 10 most heavily polluted cities in January released by the ministry, cities from this region took eight places.

Bao said smog and haze should be viewed as a type of meteorological disaster, because it only occurs under temperature inversion, when the bottom of a layer of air is cooler than the upper layer, preventing the air from natural interchanging, thus blocking pollutants from dispersing.

"The air in that condition is so stable that it's like covering a city with a lid," said Bao. "Pollutants can neither go out, nor come in - that's why smog and haze cannot be prevented by regional joint prevention and control.

"What we can do is to gradually cut the pollutants' concentration in smog and haze by taking care of each region's problems, including pollution from automobiles for Beijing, construction sites for Tianjin and burning coal for Hebei province," he said.

At a national environmental conference in late January, Environment Minister Zhou Shengxian said the government is striving to control all cities' PM2.5 levels within the national standard by 2030.

Though the public appears unsatisfied with the timetable, experts say the target may already be hard to reach.

"We can't prevent smog and haze even by 2050, because the weather conditions are not within control," said Bao. "But we may reduce the pollution level during smoggy days from 'heavily polluted' to 'medium' or even 'slight' after 10 years' efforts. Meeting the daily standard of 75 micrograms per cubic meter by 2030 may not be realistic, but we have a good chance of reaching the annual standard of 35 micrograms per cubic meter."

Bao also said the ministry may set up a special fund to control airborne pollution before 2014. The amount of money invested is expected to be similar to that in a special fund for water pollution several few years ago - more than 1 billion yuan ($160.6 million) - and a considerable proportion will be spent on scientific research.

"Before implementing regional joint prevention and control, we have to find out exactly how much pollution cities and provinces are contributing to their neighbors, which is still not clear," Bao said, adding that the investigation and monitoring of PM2.5 in China is still at an early stage.

wuwencong@chinadaily.com.cn

 

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: 亚洲日韩中文字幕 | 国产高颜值露脸在线观看 | 广东毛片 | 九九视频精品全部免费播放 | 欧美第一页草草影院浮力 | 亚洲第一网站 | 女人一级特纯黄大片色 | 精品国产一区二区三区四区vr | 欧美激情视频一区二区免费 | 日本一级在线观看 | 国产成人精品福利网站在线观看 | 中文字幕高清在线天堂网 | 欧美一区二区三区久久久人妖 | 韩国精品一区视频在线播放 | 中日韩欧美一级毛片 | 理论片中文字幕 | 夜间福利在线观看 | 午夜欧美日韩在线视频播放 | 欧美日韩国产亚洲一区二区 | 又刺激又黄的一级毛片 | 91av手机在线 | 68久久久久欧美精品观看 | 免费欧洲毛片a级视频无风险 | 91精品观看91久久久久久 | 日本污网站 | 国产精品黑丝 | 亚洲成a人不卡在线观看 | 国产孕妇孕交视频 | 日韩三级免费 | 黄黄的网站在线观看 | 欧美aaaaaaaa| 国产呦精品系列在线 | 怡红院老首页主页入口 | 成年人看的免费视频 | 欧美日韩国产亚洲一区二区三区 | 看真人视频a级毛片 | 欧美毛片aaa激情 | 香蕉伊人网 | 久久中文字幕久久久久 | 欧美色视频日本片免费高清 | 亚洲一区二区三区视频 |