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Air pollution is a global "urban disease""

DATE:2016-5-16 9:01:04

World Health Organization recently released the latest urban air quality database show that over 80% of the global urban air can be inhaled particulate matter (PM10) and fine particulate matter (PM2.5) pollution levels than the World Health Organization recommended air quality standards. Experts pointed out that the air pollution is a global urban disease, to improve the quality of air from the promotion of public transport, improve energy efficiency, the development of clean energy and other aspects of.
The World Meteorological Organization weather and disaster mitigation Services Secretary Tang Xu in an interview with Xinhua News Agency reporters said that urban productivity and the production of highly concentrated, in addition to the output of the products, but also produce solid waste, waste water, waste gas, increase air pollution. The greater the city, the more concentrated the productive forces, the greater the density of urban population, the greater the contribution to the regional pollution caused by air pollution is a global urban disease ".
Tang Xu said that urbanization not only in the horizontal direction of expansion, the height increase in high-rise buildings will lead to the decrease of atmospheric changes in wind direction and wind speed, is conducive to air pollutants stranded for a long time accumulation, is not conducive to the spread, to people's production and life impact.
Tang Xu also said that global warming lead to some changes in the atmospheric circulation patterns, such as according to statistics, steady weather frequency increased in the Asian monsoon region, is not conducive to the spread of air pollutants.
The World Health Organization the new urban air quality database covering 103 countries and regions in the world, more than 3000 cities average per 10 cities have eight urban air pollution over the World Health Organization recommended air quality standards. The standard pointed out that the annual average value of particulate matter in the air should be less than or equal to 20 micrograms per cubic meter, fine particulate matter annual average value should be less than or equal to 10 micrograms per cubic meter. In the database, the data of 210 large and medium sized cities in China can be inhaled particulate matter and fine particulate matter data indicate that the domestic urban air pollution is not optimistic.

Responsibility editor:Hao Sun

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