日批在线视频_内射毛片内射国产夫妻_亚洲三级小视频_在线观看亚洲大片短视频_女性向h片资源在线观看_亚洲最大网

US EUROPE AFRICA ASIA 中文
China / Society

Quality of air remains a global concern

(China Daily) Updated: 2013-01-16 00:43

Editor's Note: The World Health Organization answers questions on air quality and health.

What are the health consequences of air pollution?

Air pollution increases the risk of respiratory and heart disease in the population. Both short- and long-term exposure to air pollutants have been associated to health impacts. More severe impacts affect people who are already ill. Children, the elderly and poor people are more susceptible.

How serious is air pollution?

Air pollution is a major environmental health problem affecting everyone. Air pollution results from exhaust fumes from cars, domestic combustion or factory smoke. It is estimated that 2 million people worldwide ― more than half of them in developing economies ― die every year from air pollution.

What are the most polluted cities in the world?

Unfortunately, there is no comprehensive, worldwide database allowing precise answers to this question. We can also suspect that no monitoring is conducted in many cities with high pollution levels, making such an assessment impossible. Nevertheless, the available data indicate that air pollution is very high in a number of Asian cities such as Karachi, New Delhi, Kathmandu and Beijing, as well as in the Latin American cities of Lima and Arequipa, and in the Middle East city of Cairo.

It should be stressed that health concerns are not limited to the most polluted cities. Substantial health effects are seen even in the relative cleaner cities of Europe or North America, where PM levels are three to five times lower than in the most polluted cities.

Where are particulate matter concentrations especially high?

As is often the case, the biggest air-pollution-related burden to health is observed in developing economies. The lack of knowledge of the health impact of pollution is a big obstacle in defining the actions and mobilizing local and international resources.

What are the implications for public health?

Public health recognizes air pollution as an important determinant of health, especially in developing economies. There is significant inequality in the exposure to air pollution and related health risks. Air pollution combines with other aspects of the social and physical environment to create a disproportional disease burden in less affluent parts of society.

Exposure to air pollutants is largely beyond the control of individuals and requires action by public authorities at the national, regional and even international levels.

The health sector can play a central role in leading a multisectoral approach to prevention of exposure to air pollution. It can engage and support other sectors, such as transport, housing, energy production and industry, in the development and implementation of long-term policies to reduce the risks of air pollution to health.

Highlights
Hot Topics

...
主站蜘蛛池模板: 91在线观看免费高清 | 国产一级一级国产 | 九九九在线| 二区三区在线观看 | 久久精品在线播放 | 久热香蕉视频 | 四虎永久免费在线观看 | 污污的视频在线免费观看 | 麻豆影视大全 | 国产视频福利 | 中文字幕中出 | 男女国产视频 | 超碰男人的天堂 | 不卡在线视频 | 国产欧美日韩综合精品 | a v视频在线观看 | 亚洲欧美视频在线观看 | 天天曰 | 视色影院 | 国产精品自拍视频 | 日韩特黄一级 | 国产夫绿帽单男3p精品视频 | 精品久久一 | 欧洲天堂网 | 久久伊人操 | 免费中文字幕 | 久久伊人成人网 | 草久久久 | 人人爽爽人人 | 九九热视频在线观看 | 亚洲精品免费在线观看 | 成人免费毛片足控 | www视频在线观看网站 | 国产成人99久久亚洲综合精品 | 特级一级黄色片 | 精品一区二区三区毛片 | 国产又黄又爽视频 | 久久激情片 | 国产av毛片 | 成人第一页 | 欧美一区二区三区网站 |