久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

Exposure to smog is severe hazard

Updated: 2011-12-06 06:46

By Shan Juan and Wang Qian (China Daily)

  Comments() Print Mail Large Medium  Small 分享按鈕 0

BEIJING - Experts are worried that particulate matter in the air, which is in higher concentrations in North China because of the heavy fog since the weekend, may lead to various respiratory diseases including lung infections and cancer.

Shi Yuankai, vice-president of the Chinese Academy of Medical Sciences Cancer Hospital, said longtime exposure to particulate matter especially the particulate matter smaller than 2.5 micrometers (PM2.5) which can go directly to the alveoli of the lungs, is a major health hazard.

"Even if we can manage to keep the country's smoking rate flat, the lung cancer rate is expected to keep rising for 20 or 30 years and worsening air pollution could be the major culprit," he said.

Air quality in the capital has deteriorated because of the heavy fog. Beijing's air was slightly polluted on Monday, according to the China National Environmental Monitoring Center.

However, the United States embassy, which conducts its own measurements based on the concentration of PM2.5 in the air, rated Monday's air in Beijing as "hazardous".

Zhong Nanshan, a respiratory expert and academician of the Chinese Academy of Engineering, echoed Shi's concern.

He said that without intervention, PM2.5, a major cause of choking smog, would replace smoking tobacco as the top risk factor for lung cancer.

In Beijing, the lung cancer rate has increased by 60 percent during the past decade, even though the smoking rate during the period has not seen an apparent increase, said Mao Yu, deputy director of the Beijing Health Bureau.

"Increasing air pollution might be largely blamed for that," said Zhi Xiuyi, director of the Lung Cancer Treatment Center at Capital Medical University.

Lung cancer, the leading killer among cancers, claims more than 600,000 lives on the mainland annually, according to the Ministry of Health.

In the past 30 years, the mortality rate among lung cancer patients increased by 465 percent on the Chinese mainland.

"Long-term exposure to that (particulate matter) also substantially increases the risk of developing cardiovascular diseases," said Ma Changsheng, a cardiologist at Anzhen Hospital in Beijing.

"The smaller the particle, the more hazardous it is for public health," Shi Yuankai said. "Worse, protective measures like wearing face masks barely help because the particles are too small."

The disastrous effects of smog are nothing new.

In the winter of 1952, dense smog in London caused mainly by heavy coal combustion killed about 12,000 people in the city.

That incident prompted the British government to move to clean up the air, and the effort paid off, for today, PM10 concentrations read at the significantly lower level of around 30 micrograms per cubic meter in the city.

According to the World Health Organization, the main components of particulate matter are sulfate, nitrates, ammonia, sodium chloride, carbon, mineral dust and water.

Even in the EU, average life expectancy is 8.6 months shorter due to exposure to PM2.5, though the lung cancer rate has slightly decreased there in recent years, studies found.

"It is possible to derive a quantitative relationship between pollution levels and specific health outcomes," according to a 2005 World Health Organization report. Yet, in China, "we have few such studies", said Shi Yuankai.

The bad air has also disrupted traffic in the country.

Starting at the weekend, heavy fog shrouded northern and eastern parts of China. On Monday, about 219 flights were canceled and 118 delayed as of 3 pm at the Beijing Capital International Airport, according to the airport's website.

Apart from Beijing and Tianjin, nine other provinces, including Hebei, Shandong, Anhui, Zhejiang, Fujian and Jiangxi, were shrouded in heavy fog, snarling traffic.

Cars along the highway from Beijing to Harbin were backed up more than 50 kilometers in Liaoning province on Monday morning, China National Radio reported.

The heavy fog in the capital is likely to clear before Wednesday with a cold front passing and scattered snowstorms are forecast on Tuesday, according to the Beijing Meteorological Bureau.

Zheng Xin contributed to this story.

久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

    国产一区二区三区四区在线观看| 国产精华液一区二区三区| 欧美人狂配大交3d怪物一区| 午夜久久久久久电影| 欧美一区日韩一区| 国产精品一级在线| 亚洲免费毛片网站| 欧美精品高清视频| 久草这里只有精品视频| 国产精品网曝门| 在线观看91精品国产入口| 免费观看一级欧美片| 国产欧美视频在线观看| 色狠狠一区二区| 日韩电影一区二区三区四区| 久久麻豆一区二区| 一本一本大道香蕉久在线精品| 天天操天天干天天综合网| 久久综合久久99| 一本色道**综合亚洲精品蜜桃冫| 婷婷一区二区三区| 国产欧美日本一区二区三区| 欧美性受xxxx黑人xyx性爽| 韩日欧美一区二区三区| 亚洲精品亚洲人成人网在线播放| 91精品国产一区二区人妖| 成人黄色在线看| 丝袜诱惑制服诱惑色一区在线观看 | 6080yy午夜一二三区久久| 激情六月婷婷久久| 亚洲欧美日韩国产另类专区| 日韩欧美国产综合| 97aⅴ精品视频一二三区| 奇米在线7777在线精品| 中文字幕在线不卡| 欧美大片国产精品| 91福利视频网站| 国产精品资源站在线| 亚洲国产精品人人做人人爽| 国产人妖乱国产精品人妖| 欧美日韩国产精品自在自线| 大陆成人av片| 免费精品视频最新在线| 依依成人综合视频| 日本一区二区三级电影在线观看| 欧美日韩一区二区电影| 丁香一区二区三区| 蜜臀精品久久久久久蜜臀 | 不卡av免费在线观看| 人人狠狠综合久久亚洲| 亚洲乱码国产乱码精品精的特点 | 久久亚洲免费视频| 欧美日韩综合一区| 成人午夜大片免费观看| 麻豆精品一区二区三区| 亚洲电影第三页| 亚洲欧洲成人自拍| 国产欧美中文在线| 欧美成人高清电影在线| 精品视频999| 91蝌蚪国产九色| 成人综合婷婷国产精品久久蜜臀| 免费成人深夜小野草| 亚洲综合激情网| 国产精品三级在线观看| 精品欧美一区二区三区精品久久| 欧美日韩在线三区| 99久久久久免费精品国产| 国产剧情一区二区| 美女视频黄a大片欧美| 亚洲大片免费看| 亚洲靠逼com| 亚洲欧洲韩国日本视频| 中文字幕精品综合| 久久久亚洲国产美女国产盗摄 | 欧美一卡二卡在线观看| 欧美日韩国产综合久久 | 色综合久久九月婷婷色综合| 成人免费视频视频在线观看免费| 国产乱人伦精品一区二区在线观看| 日韩国产一区二| 亚洲午夜私人影院| 有码一区二区三区| 亚洲乱码国产乱码精品精可以看| 中文字幕亚洲综合久久菠萝蜜| 国产清纯白嫩初高生在线观看91| 久久久亚洲精品石原莉奈 | 亚洲乱码中文字幕| ...中文天堂在线一区| 国产精品久久综合| 国产精品美女久久久久久久网站| 国产日产精品1区| 久久精品在这里| 久久久99免费| 久久精品一级爱片| 中文字幕久久午夜不卡| 国产精品免费av| 中文字幕一区在线观看视频| 综合欧美一区二区三区| 亚洲精品日韩一| 亚洲一区二三区| 午夜精品久久久久久久久久久| 午夜欧美2019年伦理| 免费人成网站在线观看欧美高清| 麻豆成人在线观看| 国内精品伊人久久久久av一坑 | 一区二区激情小说| 亚洲国产美国国产综合一区二区| 亚洲线精品一区二区三区| 五月开心婷婷久久| 美女www一区二区| 国产精品夜夜爽| aa级大片欧美| 欧美在线观看视频在线| 欧美日韩国产综合草草| 日韩一区二区三区精品视频 | 精品成人一区二区三区四区| 久久久午夜电影| 一区在线播放视频| 亚洲一区二区三区小说| 日本一不卡视频| 国产最新精品免费| 成人性生交大片免费看在线播放 | 日韩美女主播在线视频一区二区三区| 欧美一卡2卡三卡4卡5免费| 亚洲精品一区二区三区精华液| 亚洲国产精品ⅴa在线观看| 日韩一区欧美一区| 亚洲福利视频一区| 狠狠色2019综合网| 97成人超碰视| 欧美三级在线看| 欧美mv和日韩mv的网站| 国产精品久久久久影院老司 | 欧美一级高清大全免费观看| 久久久国产一区二区三区四区小说| 中文欧美字幕免费| 亚洲妇女屁股眼交7| 久久99国产精品免费| a级精品国产片在线观看| 欧美性大战久久| 欧美mv日韩mv亚洲| 亚洲色图另类专区| 日韩极品在线观看| 成人丝袜视频网| 欧美日韩精品三区| 国产午夜精品久久久久久免费视| 亚洲色图19p| 麻豆91在线播放| 99国产精品99久久久久久| 欧美高清视频www夜色资源网| 国产亚洲一区字幕| 亚洲va欧美va人人爽| 国产一区二三区| 在线观看三级视频欧美| www国产亚洲精品久久麻豆| 亚洲精品成a人| 国产在线一区二区综合免费视频| 色国产精品一区在线观看| 欧美r级在线观看| 一区二区三区在线视频播放| 国产一区二区视频在线| 欧美无乱码久久久免费午夜一区| 久久久久久99久久久精品网站| 亚洲一区二区五区| 丰满白嫩尤物一区二区| 91精品国产综合久久小美女| 欧美国产日本韩| 奇米精品一区二区三区在线观看一| 9久草视频在线视频精品| 日韩免费电影一区| 亚洲综合另类小说| 懂色av中文一区二区三区| 欧美一区二区三区系列电影| 亚洲桃色在线一区| 国内精品视频一区二区三区八戒| 在线观看亚洲精品视频| 中文字幕的久久| 麻豆一区二区三| 欧美三级蜜桃2在线观看| 国产女人aaa级久久久级| 日本女优在线视频一区二区| 色综合久久天天综合网| 久久久久久麻豆| 奇米一区二区三区| 91福利资源站| 国产日产欧美一区二区视频| 麻豆精品新av中文字幕| 欧美日韩一本到| 亚洲视频小说图片| 国产91在线看| 欧美电影免费观看高清完整版| 亚洲成人一区在线| 色婷婷综合视频在线观看| 中文字幕第一页久久| 激情六月婷婷久久| 91精品中文字幕一区二区三区| 亚洲乱码国产乱码精品精98午夜| 成人久久视频在线观看| www国产亚洲精品久久麻豆|