Clearingawaythefogofdoubt[1]-Chinadaily.com.cn

2021年5月5日 by 没有评论

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ASIAdocument.write(“” + m[today.getMonth()+1]+ ” “+ today.getDate()+”, ” + theYear + ” “);HOMECHINAWORLDBUSINESSLIFESTYLECULTURETRAVELSPORTSOPINIONREGIONALFORUMNEWSPAPERChina Daily PDFChina Daily E-paperChina Daily Global PDFChina Daily Global E-paperChina / Cover StoryHot IssuesGovernmentSocietyInnovationEducationCover StoryPeoplePhotosClearing away the fog of doubtBy Wu Wencong and Jiang Xueqing in Beijing, and Qiu Quanlin in Guangzhou (China Daily) Updated:2012-10-30 07:52Comments Print Mail Large Medium SmallNew monitoring systems will give a better indication of pollution, report Wu Wencong and Jiang Xueqing in Beijing, and Qiu Quanlin in Guangzhou.While Fridays airborne pollution in Beijing became a hot topic on Chinas online social networks and in newspapers, the environmental authorities insisted they are taking measures to contain the problem.”Beijing has finished framing regional measures to jointly prevent and control air pollution within Beijing, Tianjin and Hebei province,” said Yu Jianhua, head of the atmospheric environment management office of the Beijing Environmental Protection Bureau.According to the Beijing Municipal Environmental Monitoring Center on Friday, trial readings of PM2.5 – particulate matter smaller than 2.5 micrometers – from most of the citys 35 monitoring stations exceeded 300 micrograms per cubic meter. The readings hit level six, indicating the highest level of pollution, four times the national standard.A heavy haze covers Langfang, Hebei province. Experts say the main sources of air pollution in autumn and winter time are coal-fired power plants, heavy industry and diesel-powered automobiles. Zhu Xingxin / China DailyMedical experts say PM2.5s are responsible for a range of conditions: Short-term exposure can result in sore throats and coughs, while prolonged bouts are thought to contribute significantly to reduced lung function, coronary disease and premature deaths.Official data suggest that about 25 percent of the capitals atmospheric pollutants blow into the city from nearby heavily industrialized regions.Yu said the new measures are part of a long-term joint project among several regions to clean up air pollution nationwide. The project was established by the Ministry of Environmental Protection and details will be released by the end of the year. However, no date for implementation has been announced.Few residents of Chinas larger cities are unfamiliar with air pollution, especially during autumn and winter, when low-hanging mist shrouds buildings in an impenetrable gray cloak.In 2010, researchers Aaron van Donkelaar and Randall Martin of Dalhousie University in Canada used NASA satellites to create a map showing that the highest levels of PM2.5 occur across a belt of land stretching from North Africa, where desert winds disturb huge amounts of dust, to eastern China, a heavily industrialized region.Since early October, Guangzhou, the capital of Guangdong province, has been covered by a pall of dust and haze.The main sources of air pollution in cooler weather are coal-fired power plants, heavy industry and diesel-powered automobiles, according to experts.”The effects of these sources are often worse in wintertime when pollutants are trapped near the ground because of poor vertical mixing,” said Richard L. Corsi, a professor in the engineering department at the University of Texas who researches indoor air quality.The weaker sunlight and lower temperatures near the ground, caused by fog in autumn and winter, keep pollutants trapped closer to the surface of the earth, he said.Increased air travelIn addition to the weather, pollutants discharged at airports are also adding to the poor air quality, especially the prevailing haze over Guangzhou, according to Wu Dui, who lives in the city and specializes in haze research.”The number of pollutants discharged by aircraft has risen in recent years, in line with the increased number of flights in the Pearl River Delta,” he said.Guangzhous Baiyun Airport is one of the few in China capable of handling the worlds largest passenger aircraft, the Airbus A380, which uses around 2 tons of fuels during take-off and landing. Thats equal to the total emissions of more than 1,000 autos, said Wu.As one of South Chinas most important manufacturing hubs, the Pearl River Delta has airports at Guangzhou, Shenzhen, Zhuhai, Zhanjiang, Foshan, Meizhou and Shantou. “There are just too many airports concentrated in a tiny region,” said Wu.Sources at Guangzhou Baiyun said the airport handled 183,400 aircraft arrivals and departures and more than 23.5 million passengers in the first half of the year. Both the sorties and passenger numbers rose by more than 7 percent from the same period a year ago.”The smoggy days in the delta region will remain until April if there are no strong winds from the north to help disperse the haze and dust,” said Wu.Previous Page1 2 Next PagePrevious Page1 2 Next Page0Related StoriesAir monitoring goes liveBetter use of air quality reports urgedHigh concentration of PM 2.5 in Beijings airBeijing releases complete data of PM2.5Shanghai begins posting PM2.5 readings from 10 stationsImproving air quality demands own effortsBeijing no longer counting blue sky daysPhotoNight views of Harbin through the lensTibetans take train home after pilgrimage or travellingWorlds largest shaftless Ferris wheel built in ChinaAncient cities to be connected by Xian-Chengdu high-speed railwaySnow turns Harbin into winter wonderlandReed Catkin Festival held in WuhanSocietyPoliticsHot TopicsScience/TechBusinessCover StoryFTZ simplifies process to launch businessesJapan can offer experience, expat saysApplication for work streamlinedAwareness of law aids resolutionAir Force units explore new airspaceLow wages and lack of respect responsible for kindergarten abuse, experts sayLiu heralds UK partnership in education and researchAgency ensuring natural gas supplyUN envoys trip to DPRK praised by BeijingChina moves to secure natural gas supply amid rising winter demandXi asks China, Canada to work for substantial tiesCooperation necessary for success, leaders sayLiving in space: How astronauts train, eat and workTeachers excused for lunchtime drinksWaiting for Shenzhou XICancer agent found in 44 cities drinking waterAt Ikea eatery, its no pay, no stayChina lose 2-0 to Uzbekistan in World Cup qualifier, coach Gao resignsC919 gains another 55 orders, lifting total orders to 785Services offset dip in manufacturingFintech to energize real economy, cut risksChinas Long March rockets complete 60 commercial launchesEngineers achieve breakthroughChina-made components add securityOnline shopping rings up customer complaintsImport expo to focus on advanced techSME mobile market platform receives first clientsChina top importer of US soybeansAir China opens direct route from Beijing to BarcelonaInsurance-based trust launchedDandelion helping to sow the seeds of stability for membersCover storyVisa change may boost tourism to USThe wrong side of the roadBuilding ban begins to biteVillagers call on Japan to atone for massacreMost ViewedTodays Top NewsHome is where the heart is: Beijing car-hailing app drivers journeyChina ranks No 1 in progress against child discriminationDogs first domesticated in ChinaAviation workers may face security checksDraft law eases curbs on foreign NGOs in countryShanghai sees more foreigners in counterfeit-products casesGovt strengthens vaccine oversightThree Gorges Dam discharges more water, braces for floodTwo dramatists, one world apartChina open to Sino-US space cooperationA Chinese traffic cop prevents accidents thanks to his experience, winning praise from the world after a surveillance video was broadcasted by CNN.HighlightsHome is where the heart is: Beijing car-hailing app drivers journeyAviation workers may face security checksFighting copyright infringement a constant battleVideo clip of a man burning to death sparks controversyHot TopicsGround level Rule of law Panda China youths Anti-terror drive Family planning Smog Fox Hunt Beijing integrates with Tianjin, Hebei China cracks down on graftSpecial2016 legislative and political advisory sessionsMy Chengdu story…| About China Daily | Advertise on Site | Contact Us | Job Offer | Expat Employment |Copyright 1995 -var oTime = new Date();
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