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Air Pollution In China

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Last Updated: 18 January 2022

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Outdoor Air Pollution is one China's most serious environmental problems. Coal is still major source of energy, constituting about 75 percentage of all energy sources. Consequently, Air Pollution in China predominantly consists of coal with suspended particulate matter and sulfur dioxide as principal air pollutants. In large cities, however, with rapid increase in number of motor vehicles, air pollution has gradually changed from conventional coal combustion type to mixed coal combustion / motor vehicle emission type. Currently, inhalable particles, SO 2, and nitrogen dioxide criteria pollutants of concern in China. Generally, PM levels in cities in North are higher than those in south, whereas SO 2 and NO 2 levels do not differ much. In 2004, annual average PM 10 concentrations for major Chinese cities were 102 g / m 3 in southern 140 g / m 3 in northern cities, and 121 g / m 3 in cities nationwide. Annual average concentrations of SO 2 and NO 2 nationwide 66 g / m 3 and 38 g / m 3, respectively. Although its ambient air quality has improved substantially, China is still facing worst Air Pollution problem in world. Outdoor Air Pollution has become major concern for public health. World Bank Estimates That Total Health Costs Associated With Outdoor Air Pollution In Urban Areas Of China In 2003 Was Between 157 And 520 Billion Chinese Yuan, Accounting For 1. 2-3. 3 percentage of gross domestic product. Health end points studied in China in association with Air Pollution all-cause mortality, mortality and morbidity due to cardiopulmonary disease, and numbers of outpatient and emergency department visits. Changes in respiratory and other clinical symptoms, lung function, and immune function also study. Dozens of Time-series studies have been conducted in large Chinese cities, including BEIJING, SHANGHAI, Chongqing, Shenyang, Wuhan, and Taiyuan, to assess association of short-term exposure to Air Pollution with mortality or morbidity. Mortality or morbidity risk estimates per unit increase in air pollution level among Chinese populations are generally similar in magnitude to risks estimated in other parts of world. Recent multicity Time-series analysis in Hong Kong, SHANGHAI, Wuhan provide further evidence of short-term risks, with significant health effects detected at Air pollution levels below minimum air quality standards in China. Currently, new National-level Air Pollution Time-series Study, China Pollution and Health Effects Study, is under way. In addition, several ongoing panel studies are examining associations between air pollution and subclinical health outcomes before, during, and after 2008 Summer Olympic Games in BEIJING. These panel studies should provide unique opportunity to assess public health benefits of air pollution reduction in cities where air pollution levels have been high. Relatively few studies have examined long-term effects of air in China.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

Mason F. Ye

China is notorious for being major polluter. Its economic growth in past three decades has been fastest among major nations, which is main factor why China has extensive air pollution. Of twenty cities with worst Air Pollution worldwide, 16 are located in China, including Beijing. 1 23 Due to this extensive Air Pollution, China Environmental Sustainability Index is ranked near bottom countries worldwide. 2 causes of Beijings widespread air pollution can be attributed to number of factors: enormous economic boom, surge in number of motorized vehicles, population growth, output from manufacturing, and natural reasons which include citys surrounding topography and seasonal weather. China has also experienced major economic growth with drastic rise in Gross Domestic Product. This increase in wealth can be correlated with increase in pollution. With this amplified wealth, individuals are capable of affording motor vehicles. 1 456 Number Of Motor Vehicles On Beijings Roads Has Doubled To 3. 3 million with nearly 1200 each day. Emissions from motorized vehicles contribute to nearly 70 percentage of citys Air Pollution. Four Most Dangerous Pollutants That Are Emitted Include: Sulfur Dioxide, Nitrogen Dioxide, Carbon Monoxide, And Particulate Matter. 3 Newly introduced vehicles have lower emission standards, and thereby emit more of these pollutants into atmosphere than their older counterparts. Motorize vehicles only one contributor to Air Pollution. Population growth in China and contributes to extensive pollution. Beijing Population Has Swollen From 11 Million To 16 Million In Just 7 Years, And Has Doubled Over Past Century. 1 3 coal burning factories also contribute to smog present in Beijing. These factories rely outdated and inefficient technologies. Factories are located on outskirts of Beijing and nearby cities of Harbin and Hebei. 1 Beijing is victim of its own topography because it is surrounded by mountains, ensuring that remains trapped within city limits. 5 Air Quality worsens in spring and summer when temperature and humidity levels rise, and wind contributes to smog by carrying pollutants from southern regions. 3 There are variety of consequences of Air Pollution in Beijing. Along with health consequences, high levels of harmful emissions have led to hundreds of flight cancellations and frequent road closures due to visibility levels. 7 Air Pollution has increased substantially over years, resulting in thick smog that often engulfs entire city 6. Air Pollution is measured by Air Quality Index, which scales pollution levels from 0 to 500 and assigns color to different number levels to measure how hazardous air quality is on any given day. Levels of 100 or below are know as Sky Days, when smog is not easily visible. 3 57 However, levels now reach up to 755, as measured by United States Embassy in Beijing, which employ its own pollution reading device.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

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* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

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