Air pollution is the air contains one or DuoZhong pollutants, the amount of its existence, the nature, and time will harm to human, plant and animal life, damaging property, or interfere with the comfortable life environment, such as the existence of the smell. In other words, as long as it is a kind of material its existence, nature and the amount of time enough to human or other biological, produce the goods, we can influence, called the air pollutants; And the existence of the phenomenon, is caused by air pollution. ugg boots sale,In other words, some substances in the air in the delta is produced not normal air pollution situation. City of outdoor air pollution culprit, when several car transport, small manufacturing and other coal as fuel to the industry, etc. And the above list mostly in the city for heavy industry and manufacturing industry. In addition, the residents burn wood, coal for heating and air pollution sources of contamination.

Yesterday, WHO issued the first global air quality report, in addition to clear that Iran, India, Pakistan, and Mongolia pollution is the most serious city outside, but also issued a "global many urban air pollution at threat to human health degree" warning. "Iran's southwest, o city, and Mongolia's capital ulan bator,, Pakistan and India city", WHO report data point out the four Asian city is a global air quality is the worst. The global air pollution, o city, the city's top particle size less than 10 micron PM10 (PM10) concentrations reach 372 MCG/m3, the world health organization is 20 micrograms of the suggested value nearly 19 times. Ulan bator PM10 average concentration for 279 MCG/cubic meters.cheap coach store, Followed by Iranian city of sananda grew jie, up to 254 MCG/cubic meters. In addition, Pakistan and India's cities, such as carlos of camp, and HaBoLuoNa capital Botswana's minds air pollution city on the list. Relative to the "dirty not clear" Asian countries, Canada and the United States it is "pure land" city. Canada yukon PM10 concentration in average only three MCG/m3, the United States is Santa fe for 6 MCG/cubic meters. In addition, Tokyo, Paris performance is good, with an average annual PM10 levels control in 40 micrograms/stere less than.

For standard, WHO advises PM10 concentration of value is the maximum not more than 20 micrograms per cubic meter. The report says, less than 10 microns in size of particles can enter human body lung, and may enter the bloodstream, which can lead to heart disease, lung cancer, asthma and acute lower respiratory infections. Although the WHO recommends that for every stere threshold of PM10 20 micrograms, but the present some of the city's a number that is as high as 300 micrograms. The WHO says, at present urban crowd exposed to the particle concentration level of environment, of health harmful effects. nike jordans store,The health impact of particles is various, but mainly affect the respiratory system and cardiovascular system; But along with the environment in the level of exposure to increase, the particles of health effects the risks are getting higher. WHO estimates that more than 2 million people a year die from air pollution, and in early 2004, WHO estimates that the number of die from air pollution is 1.15 million.