国产热热热精品,亚洲视频久久】日韩,三级婷婷在线久久,99人妻精品视频,精品九热人人肉肉在线,AV东京热一区二区,91po在线视频观看,久久激情宗合,青青草黄色手机视频

USEUROPEAFRICAASIA 中文雙語(yǔ)Fran?ais
China
Home / China / China

Excessive coal use main contributor to smog, expert says

By Xinhua | China Daily | Updated: 2014-12-10 08:01

Excessive use of "unclean" energy, not vehicle emissions or the burning of straw, is the main contributor to the country's recurrent smog, a China Youth Daily report quoted an expert as saying on Monday.

Speaking at a symposium organized by the China Association for Science and Technology, Zhang Xiaoye, director of an atmospheric composition committee under the China Meteorological Society, said that though straw burning, fireworks and vehicle emissions contribute to air pollution, "excessive use of 'unclean' energy is the real culprit".

According to the report, Zhang used the term "unclean" energy to refer mainly to coal.

"Coal and other unclean energy sources are the number one contributor to China's smog," he said, adding that vehicle emissions may come second, especially in big cities.

Citing PM2.5 readings recorded in early November, when Beijing hosted the Asia-Pacific Economic Cooperation meeting, Zhang said the figures showed a considerable drop of 35 percent.

He said only 10 percent of the pollution reduction came from the odd-and-even license plate vehicle restrictions, which reduced daily traffic by up to 11.7 million cars, whereas the rest was the result of cuts in coal burning in Beijing's neighboring regions starting from Nov 6.

Many parts of China have been regularly plagued by choking smog since 2013. The situation in North China is particularly serious.

To ensure good air quality for APEC, nearly 4,000 factories in Hebei were ordered to close or curb production during the weeklong meeting.

As a result, the Beijing sky remained blue during APEC despite predictions otherwise, with the daily PM2.5 density in the period falling to 43 micrograms per cubic meter, prompting Chinese netizens to coin the phrase "APEC Blue" to describe the clear sky.

Since the lifting of the bans, Beijing has reported several spells of mild to serious air pollution, with PM2.5 density reaching 224 micrograms per cubic meter in Beijing on Tuesday.

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
常山县| 阿城市| 南漳县| 万山特区| 大洼县| 松溪县| 阿荣旗| 黔西县| 天长市| 观塘区| 德阳市| 双辽市| 眉山市| 腾冲县| 宜都市| 西乌珠穆沁旗| 玉屏| 台江县| 天长市| 正定县| 泸溪县| 绩溪县| 玛沁县| 南康市| 毕节市| 宣武区| 金湖县| 仁寿县| 车致| 台州市| 邻水| 博乐市| 溧阳市| 平顶山市| 华阴市| 巴彦淖尔市| 德阳市| 吉木乃县| 五大连池市| 银川市| 宜都市|