according to, at present, the urban atmospheric environment quality is poorer, and the world health organization environmental air quality guiding value, there will be a gap.And experts say, there is scientific data prove, PM. And lung cancer, asthma, closely related to the disease.And PM. It was the culprit behind the weather formed gray haze.
one of the most serious air pollution in our current
national air quality standards in years of, and in the years after respectively and years has been revised.At present, most of our cities PM. Concentration over the world health organization rules the first stage of the emissions standards.
according to our country "environmental air quality standards" regulation, daily monitoring and posted by the three key air pollutant index: pm10, sulfur dioxide and nitrogen dioxide.
the index of for optimal when in ~, ~ for good when, above for pollution.Standard of monitoring "pm10" refers to the particle diameter less than micron, but not including "head more small", less than. Micron particles (hereinafter referred to as "fine particles", say again PM.).In the above three pollution index, pm10 in the ratio of air pollution in the most, but the fine particles and pm10 in up % ~ %.
when a large fine particles floating in the air, and visibility will become smaller, the sky look dusty, this phenomenon is called the meteorology "grey haze days".And cause this gray haze days culprit is fine particles.
according to the U.S. national air and space administration announced a world of air quality maps show that, the global fine particulate pollution of the highest in north Africa and China is the north China, east China and all of central China, most areas of China fine particulate concentrations reach micrograms average/stere, beyond the world health organization about pollution index of the provisions of The Times.
to present China's air pollution control under unprecedented pressure, especially the long Yangtze river and pearl river delta region of city air quality is not satisfactory, ozone, gray haze pollution is the characteristic of complex pollution is revealed.
China environmental science academy of published a report said: "pearl river delta, Yangtze sanjiang, the beijing-tianjin-hebei, sichuan basin and shenyang, urban agglomeration, the serious pollution of fine particulates atmosphere."And material says, Shanghai, guangzhou, tianjin, shenzhen and other cities gray haze days accounted for the annual days % ~ %.China has become the world's most serious air pollution one of the countries.
the international standard of measure air pollution is measure each cubic meters with air suspension imperceptible particle, the world health organization is the standard micrograms.But China only % of the city's residents live in micrograms of standard the following, and a % of the city's residents live in micrograms in the air above standard.
gray haze injuries have how old
according to the provisions of the world meteorological organization, when atmospheric level less than km visibility, relative humidity is less than %, so of the weather conditions for gray haze.In
air environmental quality (API index) system, the international standard is the monitoring so2, no2, ozone, carbon monoxide and pm10 (PM), fine particle particles (PM., PM), visibility, and at present our country just monitoring so2, no2 and pm10.
PM., is refers to the diameter, equal to. Microns (less than people across the degree of finish /) particles, also known as can be inhaled lung particles.
in China, pm10 national standards is year average per cubic meter of air micrograms concentration, is the world health organisation standards of The Times.
medical research shows that the smaller particles, the greater the damage to human body health.Fine particles very tiny particles, can penetrate through the respiratory protection structure, deep into the lung and bronchus, the direct impact of the lung ventilation function, cause lung sclerosis, asthma and bronchitis, and even cause cardiovascular disease.
fine particles particles in alveolar difficult to fall off adsorption.And, fine particles in the air particles can also carry viruses, bacteria, radioactive substances such as dust and heavy metal, on the respiratory system, cardiovascular, immune system, fertility, nervous system and genetic effects are.
experts warned that "gray haze formation will to all sorts of infectious disease of popular have important role, live for a long time in such atmospheric environment, human body resistance will also greatly abate."
and experts warn that some toxic substance can penetrate into the alveolar dissolved, some can't absorb of toxic chemicals in the sticky lung cells of the surface, while those who were dissolved of toxic chemicals and the blood of people with the organs including heart damage.If the same position repeated inflammation, will have the possibility of canceration.
human need to breath cubic meters of air every day, live in the person in the city is equivalent to a "cleaner" and "filter".Go down for a long time, fine particle pollution on the body of the chernobyl nuclear damage than serious.
study, the whole population of the lung cancer mortality data and atmospheric total suspended particle the annual concentration data are calculated, the result show that lung cancer mortality and years ago total suspended particles of grey correlation degree is the largest, this means that the total suspended particles to lung cancer the incubation period for dollars in.
is the greatest impact human physiology age at both ends of the children and the elderly, done in the us last year a prospective study found that traffic pollution can significantly hinder the development of children's lung function.Gray haze, for a physique weaker old man, it means death.
in many Chinese large and medium-sized cities, millions face and in the air the invisible killer close contact.
have material says, our respiratory system with disease of heart head blood-vessel of death always lost an average life expectancy for years, severe pollution appears after the sixth day respiratory system disease reached the highest mortality, and cardiovascular system disease death is lagging behind two days.In
, the Chinese city of air pollution caused by total nearly. Ten thousand people dead and about respiratory and circulatory system patients in hospital, about. WanXinFa chronic bronchitis patients, the economic losses caused by as much as. One hundred million yuan.
experts so issued a warning, the best exercise people to stay at home, gray haze days exercise and movement is undoubtedly "swing ZiQiang sword", if want to go out to wear a mask.
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