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

Make me your Homepage
left corner left corner
China Daily Website

Smog stalling return of overseas Chinese

Updated: 2013-11-20 22:16
( Xinhua)

XI'AN - Experts have warned that China's frequent smog may deter overseas Chinese from returning, as the start of the heating season in the north of the country risks worsening the problem.

Many northern Chinese cities officially turned on public heating last Friday, pressurizing the government as it tries to fight smog by reducing consumption of coal.

With the pollution battle entering this make-or-break period, Xinhua spoke to a range of Chinese with both atmospheric expertise and experience of living abroad. They made the gravity of the problem as clear as a blue-sky day.

Lin Yanluan, an associate professor at Tsinghua University's Center for Earth System Science, returned to China in 2012 after 11 years in the United States.

Lin heard about China's air pollution before he returned but never expected it to be so serious. The 40-year-old said, "Many people around me have respiratory diseases that may be related to the air pollution. I hardly ever play basketball outdoors now."

One of Lin's friends in the United States posted a blog to express his concern. "He wanted to return and develop his career, but he was worried the health of his child would be affected by smoggy weather," explained Lin.

As an atmospheric scientist, Lin conducted an experiment proving that large-scale smog lessens atmospheric circulation, leaving the pollution to linger for longer.

"Weather exerts a strong influence on smog. It seems that you only see blue skies in Beijing when there is wind to blow away the smog," he added.

WHAT TO BLAME

Seventy of the 74 Chinese cities monitored by the Ministry of Environmental Protection suffered from air pollution in the third quarter of this year, the ministry announced recently. In the case of 15 of them, more than half the 92 days failed to meet the ministry's atmospheric standards.

Wu Qiong, 26, is an overseas student in Pittsburgh. For her, China's air pollution was rammed home when she compared images of the giant rubber duck artwork that had been touring the world. In Pittsburgh, it floated under white clouds, Wu remembered. But in Beijing, everything was shrouded in grayness.

"My friends and I are concerned with poor air quality in China. Besides job opportunities, it could be said that lingering smog has already become a new factor to consider when overseas Chinese decide whether or not to come back," she said.

Tackling smog has been put on the agenda of Chinese governments at all levels, and has become a hot topic for academic seminars as well as household discussions.

"The causes are various and complicated. We must analyze both sources and dispersion of smog," said Zhao Chuanfeng, a professor at Beijing Normal University's College of Global Change and Earth System Science.

Zhao came to the United Stated in 2002 and worked in California after graduation. He returned to China not long ago.

He pointed out that coal fires, traffic emissions and atmospheric dust all contribute to air pollution.

"Smog-forming pollutants come from many sources, so we need to figure out their relative contribution by building observing sites and dispersion models," according to Zhao.

One person who has attempted this breakdown is Yan Hao, deputy director of the environmental watchdog in Xi'an, which had only five days with good air quality in the first quarter of this year.

"Coal fires, traffic emissions and atmospheric dust account for 75 percent of the total smog-forming pollutants in Xi'an," said Yan.

Another 10 percent of the pollutants were contributed by organic waste gas from sources including gas stations, auto repairs and home decorations, he added. "And we have more than 10,000 restaurants emitting cooking fumes and consuming fuels."

LONG WAY TO GO

Xiao Hang came back from Canada last year and became a researcher at the Institute of Urban Environment under the Chinese Academy of Sciences.

"I think heavy smog will affect China's international image," he said. His friends in Canada regularly discussed this issue. While they care about development opportunities in China, environment and health have come to assume greater important in recent years.

Like Xiao Hang, 40-year-old Fu Yu left Harvard University and returned to China this year.

"My son was taught to conserve energy and protect the environment in an American kindergarten," he said. "But I found in our nation, many people still don't know much about that."

But the government is aiming to correct this ignorance. In September, China announced an action plan to tackle air pollution, aiming to cut the density of inhalable particulate matter by at least 10 percent in major cities nationwide by 2017.

"Xi'an is shutting down high-polluting factories and promoting environmentally friendly energies," according to Yan Hao.

The total number of vehicles in Xi'an is about 1.7 million, consuming 1.35 million tonnes of oil and emitting 300,000 tonnes of key pollutants each year, an amount that is equal to the city's level of industrial discharge.

In response, public security departments have toughened checks on vehicles, including phasing out older ones.

Lin Yanluan also recalled that when he stood in the streets of New York, the smell of vehicle exhausts was not as pungent as in Beijing.

"So improving the quality of gasoline is also very important," Yan observed.

In Xi'an, more than 70 of the city's 600 gas stations have switched to cleaner fuel to meet the national level-IV standard, which allows for the sulphur content of fuel to be no more than 50 parts per million (ppm).

"Experts said this standard might reduce vehicle exhaust fumes by 10 percent compared to the level-III standard with sulphur content as high as 150 ppm," Yan said.

Xiao Hang now lives in China's coastal city of Xiamen. "The air quality is good here, but perhaps these cities will face the same problem someday," he said.

It is a problem which big cities in industrialized countries have repeatedly come up against for decades. China still has a long way to go, Xiao added.

8.03K
 
...
Hot Topics
A sailor from British Royal Navy destroyer HMS Daring tries to catch a mooring line to dock in the north side of the bund at Huangpu River in Shanghai December 10, 2013.
...
...
主站蜘蛛池模板: 亚洲狠狠ady亚洲精品大秀 | 色黄网站aaaaaa级毛片 | 姐姐真漂亮在线视频中文版 | 手机国产日韩高清免费看片 | 亚洲第一视频网站 | 日韩美女视频在线观看 | 亚洲精品中文字幕久久久久久 | 国产真实生活伦对白 | m男亚洲一区中文字幕 | 欧美一级毛片在线看视频 | 亚洲视频中文字幕在线观看 | 精品国产一区二区三区久久影院 | aa日本| 欧美成本人视频 | 嫩草影院成人 | 台湾黄三级高清在线观看播放 | 久操精品在线 | 亚洲精品成人网久久久久久 | 人妖欧美一区二区三区四区 | 成人免费观看www在线 | 久久精品免费观看久久 | 久久精品国产亚洲网站 | 亚洲欧美一区二区三区在线 | 成年人视频在线免费看 | 亚洲精品久久久久午夜三 | 免费人成网站免费看视频 | 亚洲天堂在线视频观看 | 日本久久一区二区 | 亚洲高清视频网站 | 国产成人精品曰本亚洲77美色 | 精品日韩欧美一区二区三区在线播放 | 亚洲视频在线观看网址 | 久久一日本道色综合久久 | 国产一区视频在线播放 | 精品国产成人三级在线观看 | 国产精品18久久久久久vr | 国产成人经典三级在线观看 | 成人网18免费 | 亚洲精品久久久中文字 | 国产色视频一区二区三区 | 中文字幕亚洲 综合久久 |