more than 200 micrograms / cubic meter is caused by pollution. At the beginning of this year

The

report from our correspondent (reporter Zhou Jingqi) recently, the city to meet continuous sunny days, the concentration of PM2.5 was low, it means that the air quality is good? Municipal environmental protection monitoring center of the Cheap Kobe Bryant NCAA Jerseys monitoring data show, after the afternoon before ozone exceed the standard, yesterday afternoon, the city's most Cheap Harvard University Basketball Jerseys monitoring site monitoring ozone concentration to exceed the standard, the overall as moderately polluted air. Forecast, today the primary pollutants during the day the region will remain as ozone, city and the northern suburbs county is expected to moderate pollution, light pollution in the county of the south. Because ozone "spoiler", let the city air pollution days encounter.

January 1, 2013, fine particulate matter (PM2.5), ozone (O3) and carbon monoxide (CO) three pollutants, also be incorporated into the city air quality monitoring project. According to the new national standard, 8 hour average ozone concentration at 160 micrograms / cubic meters, air quality as excellent, 160-200 g / cubic metres below as well, more than 200 micrograms / cubic meter is caused by pollution. At the beginning of this year, the City Environmental Protection Bureau in 2013 air quality report, last year the pollutants exceed the standard 189 pollution days, 77.8% of the Cheap Marquette Golden Eagles Jerseys pollution day because of PM2.5 exceed the standard, 20.1% exceed the standard for ozone. And pointed out that exceed the standard, ozone occurs mainly in May -9 month.

since the day before yesterday, real-time broadcasting air quality municipal environmental protection monitoring center administrative micro-blog "Beijing environmental monitoring", began to list the ozone hourly average concentration. In the winter, spring season two, PM2.5 almost as the only object real-time broadcast. On the afternoon of the same day, ozone instead of PM2.5, become the primary air pollutants. Yesterday at 12 pm, district six city ozone concentration of 115 micrograms / cubic meter, ozone northwest exceed the standard, up to 202 micrograms / cubic meter. 4 pm, the ozone concentration regions all exceed the standard, an average of about 250 micrograms / cubic meter.

Ministry of environmental protection last year monthly air quality report shows, June, July, August, the Beijing Tianjin Hebei region, nearly half of pollution days, ozone instead of PM2.5, has become the primary air pollutant. The municipal environmental protection monitoring center, May to September, when the temperature is higher, prone to ozone pollution exceed the standard. Respiratory ozone mainly harm the human body, also have certain stimulation to eyes. Afternoon to the evening peak period, as the concentration of ozone, under normal Cheap UCLA Bruins Jerseys circumstances, the outdoor Cheap Kentucky Wildcats Jerseys higher than indoor concentration, leeward than the high concentration. In the ozone concentration is high, it is recommended to minimize outdoor activities.

On a

What is the source of

ozone?

Chemical molecules

ozone type is O3, and oxygen (O2) molecular formula only subtle differences, but the chemical nature of the two difference between the large. Ozone source, College of environmental science and engineering, Peking University vice president Xie Shaodong introduction, photochemical ozone between nitrogen oxides and volatile organic compounds, the process requires adequate light and temperature. "As long as there is air in the combustion, will produce nitrogen oxides, volatile organic compounds from industrial emissions, vehicle exhaust, decoration, painting etc.. >