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

US EUROPE AFRICA ASIA 中文
China / Society

Sun shines on Urumqi anti-pollution projects

By Shao Wei in Urumqi (China Daily) Updated: 2012-12-19 02:49

One of China's most polluted cities in winter, Urumqi, has seen a massive improvement in its air quality, residents and experts said.

By Dec 10, the capital of the Xinjiang Uygur autonomous region had 279 "fairly good" days this year, three more than in 2011, according to the environmental protection agency.

"The sky is blue and the snow stays white, which was rare in Urumqi in the past. It's an amazing change," said Yuan Huixia, 51, as she did her morning exercises in a snow-covered park.

"Thick, black smoke used to cover the city throughout winter, even on sunny days. It was only on trips outside the city that we'd see clear skies and realize it's a sunny day," she said.

The fresher air has also led to a decrease in the number of patients who are in hospitals with respiratory problems this winter, data suggest.

In November, 1,983 people were seen at the outpatient department of the People's Hospital of the Xinjiang Uygur Autonomous Region for respiratory problems, compared with 2,711 in the same month last year.

"Heavy smog has always triggered respiratory trouble for people in winter. The improved air quality this winter is the main reason for the decrease," said Qiao Lipan, director of respiratory medicine at Urumqi Children's Hospital.

The improved air quality is the result of the city government's massive investment in March in 16 projects, including a large overhaul of the city's heating system — especially the demolition of 5,000 small coal-firing furnaces for winter heating — and improving air emissions treatment at 30 big polluting factories.

The gas-powered heating system now covers 76 percent of the city's population, massively cutting its reliance on coal.

Natural gas is cleaner than coal and can greatly reduce sulfur dioxide and soot emissions, said Parida Yakup at Xinjiang Agricultural University, who has studied air pollution controls for more than 20 years.

"The city started a 'Blue Sky Project' in 1998 to deal with severe air pollution. However, only this year did Urumqi residents begin to see the effects," she said. "You see, the color of sparrows has turned from black to normal."

Air pollution has been a persistent headache for the city over the past decade. Pollution levels in the winter are almost double those in summer, largely because of heating system emissions.

The Xinjiang capital, in a river valley and surrounded by mountains, has difficulties with atmospheric dispersion and dilution in wintertime. The long heating period, October to April, generates tons of sulfur dioxide and soot, blanketing the city in a heavy haze in the winter.

In an assessment of national environmental protection and pollution control in 2007, the city was rated "substandard" for its air pollution in winter.

"In the past decade, to cut air pollution, the city demolished small furnaces, built large furnaces for concentrated heating, and increased the height of chimneys," Parida Yakup said. "However, such efforts could not solve the air pollution. The waste gas and soot were emitted into a higher layer of the atmosphere, but still in Urumqi."

She also expressed concern over the use of natural gas as a main heating resource.

"The large-scale use of natural gas has brought us more blue-sky days, but it cannot solve the problem alone," she said.

Rui Lihong, chief engineer of the Urumqi environmental protection agency, agreed and added that, as Xinjiang has rich coal resources that cost far less than natural gas, factories are reluctant to switch.

Moreover, she added, the greatest cause of Urumqi's air pollution has changed from coal-fired heating to vehicle emissions.

More than 500,000 vehicles are registered in the city, up from 400,000 in August 2011, and the number keeps rising, according to the public security bureau.

Contact the writer at shaowei@chinadaily.com.cn

Highlights
Hot Topics

...
主站蜘蛛池模板: 亚洲精品色综合色在线观看 | 久草在线观看视频 | 精品国产v无码大片在线观看 | 久久91综合国产91久久精品 | 一本一本久久a久久精品综合麻豆 | 欧美精品人爱c欧美精品 | 亚洲国产精品线观看不卡 | 久久国产精品一区二区三区 | 国产精品国产自线在线观看 | 欧美精品一二三区 | 在线91精品亚洲网站精品成人 | 国产视频一区二区三区四区 | 九九视频在线免费观看 | a级国产乱理伦片在线观看 a级国产乱理伦片在线观看99 | 免费欧美黄色 | 成人免费福利网站在线看 | 欧美成人毛片一级在线 | 毛片手机在线观看 | 久久九九色 | 丁香婷婷影音先锋5566 | 日本一级在线播放线观看视频 | 亚洲乱人伦精品图片 | 模特精品一区二区三区 | 免费黄色三级网站 | 国产不卡精品一区二区三区 | 国产在线成人精品 | 欧美线在线精品观看视频 | 一区二区三区在线免费视频 | 日本草草影院 | 黄色国产在线观看 | 成年男女免费视频网站播放 | 欧美亚洲日本一区二区三区浪人 | 成年女人毛片免费视频 | 国产精品黄在线观看观看 | 美女被免费网站视频软件 | 纯欧美一级毛片免费 | 一区二区在线免费视频 | 99久久国内精品成人免费 | 巴西一级毛片 | 亚洲国产一区二区三区四区五区 | 精品视频在线免费看 |