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December 12th, 2011:

Death-by-Air in Beijing Shows China’s Heart Risk From Worsening Pollution

Death-by-Air in Beijing Exposes Pollution’s Untold Heart

Mark Ralston/AFP/Getty Images

Cars travel on the second ring road as pollution reaches what the US Embassy monitoring station says are ‘Hazardous’ levels in Beijing on December 5, 2011.

Cars travel on the second ring road as pollution reaches what the US Embassy monitoring station says are ‘Hazardous’ levels in Beijing on December 5, 2011. Photographer: Mark Ralston/AFP/Getty Images

Citizens Offer Clarity on Beijing's Air Quality

Dec. 12 (Bloomberg) — Bloomberg’s Paul Allen reports on Beijing’s air pollution levels. Poor air quality in Beijing, and the way it’s reported by government authorities, is prompting some of the city’s residents to take measurements into their own hands and post the results online. (Source: Bloomberg)

As smog grounded hundreds of flights from Beijing last week, emergency doctors at Peking UniversityPeople’s Hospital faced a rush of patients.

Lungs weren’t the problem, says Ding Rongjing, the hospital’s deputy head of cardiology. Five people were admitted for heart attacks from Dec. 4 to 6, compared with one or two a week typically. One 60-year-old male patient died.

The illnesses are an unwanted consequence of the economic growth that helped spur a 32 percent jump in China’s car sales last year. Outdoor air pollution kills 1.3 million people globally each year, the World Health Organization estimates. A growing body of evidence shows dirty air not only triggers asthma and other respiratory conditions, over time it may the damage heart and blood vessels, and even cause birth defects.

“Whenever we have days with bad pollution, we get significantly more patients with symptoms like high blood pressure, feeling of suffocation, and chest pains,” Ding said in an interview at the hospital, where she’s worked since 1996. On days of extreme pollution, heart and stroke cases at the 1,450-bed center can increase as much as 40 percent to 280 patients, she said.

Before hosting the 2008 Olympics, Beijing imposed driving limits, suspended work at construction sites and moved factories out of the city to clean up the capital’s air. Economic growth, averaging 10 percent a year, and a population of 19.6 millionpeople expanding at a 3.8 percent clip is making air-quality improvements harder to sustain.

Starve the Heart

Microscopic air particles 30 times smaller than the width of a human hair penetrate deep in the lungs, where they can pass into the bloodstream, said Jon Ayres, professor of environmental and respiratory medicine at the University of Birmingham, in a telephone interview. The contaminants increase the risk of artery-blocking clots that can starve the heart, brain and other organs of oxygen, according to Ayres.

“In somebody with coronary artery disease where the arteries are narrower anyway, having blood that is more likely to clot is a bad thing,” said Ayres, who chairs a U.K. panel on the medical effects of air pollutants.

The danger is increased when the inhaled substances cause the coronary arteries to become inflamed, he said. Cardiovascular disease is the biggest killer in China, accounting for 38 percent of deaths, the WHO says.

Traffic Jams

Constant traffic jams and resultant idling engines emit lung-penetrating toxic material, said Pan Xiaochuan, a professor of environmental health at Peking University who studies the impact of air pollution.

The U.S. embassy in Beijing monitors pollutants smaller than 2.5 micrometers in diameter, known as PM2.5, and releases the information via Twitter.

“What is needed is better traffic management,” Pan said.“People still drive even if the traffic is bad, and it’s hard to convince them to take public transport after they spent so much money to buy their own cars.”

There were 4.81 million vehicles on Beijing roads last year, triple the number in 2000, government data show. Car ownership in China is offsetting the benefits of the past decade’s efforts to limit industrial emissions, said Xu Dongqun, deputy director of the Institute for Environmental Health and Related Product Safety at the Chinese Center for Disease Control and Prevention.

Murky Haze

“The level of fine particulate matter is still increasing because it comes not just from industrial emission and coal-burning, but also from the large amount of cars on the roads,”Xu said on Dec. 5 from a second-floor meeting room in central Beijing, where murky haze outside rendered the housing blocks across the street barely visible. “This is why we see the level of PM2.5 worsening in cities.”

Emissions data on PM2.5 are slated to be made publicly available throughout China’s cities, including Beijing, by 2016. The timeframe is too slow, according to a Dec. 8 editorial in the state-owned China Daily newspaper, which called on the government to be “brave enough” to measure the tiny contaminants.

The government currently uses an indicator known as PM10 that measures particulate as big as 10 micrometers in diameter for its public pollution data.

Air quality in all of the 32 Chinese cities that track pollution fall short of WHO guidelines. The air in Beijing is the fifth-worst in China, based on the PM10 measure. Annual levels average 121 micrograms per cubic meter of air, compared with a global average of 71 micrograms and the 20 micrograms recommended by the Geneva-based agency.

Deadly Air

Each 10-microgram increase above WHO guidelines for PM2.5 boosts emergency room visits for cardiovascular ailments by as much as 7 percent, a 2009 study by the Peking University School of Public Health found.

Breathing dirty air does have an impact on mortality, researchers found in a 12-year study in June involving 12,584 residents of the northeastern city of Shenyang. After adjusting for smoking and other known risk factors, the authors found levels of PM10 and the air pollutant nitrogen oxide “were significantly associated” with death from cardiovascular and cerebrovascular diseases, they said.

Information on air quality in Beijing is provided by multiple sources, including the U.S. embassy, and daily measurements are often inconsistent. That makes it harder for residents to know how and when they should take extra precautions, says cardiologist Ding.

Smog Deterrent

The Chinese CDC would like to see coordinated warning data broadcast on the nightly news, the center’s Xu said. Publicizing the data may have implications for businesses if it means more people are worried about air quality and are reluctant to live in the city.

“That’s one of the major factors that has an impact on standard of living in Beijing,” said Lee Quane, the Hong Kong-based regional director for Asia at ECA International. Executives relocating from abroad will typically opt for Hong Kong over Beijing if they have choice, he said.

The human resources advisory firm recommends employers pay Beijing staff a higher hardship allowance than those in Chinese citiessuch as Shanghai, Guangzhou, Shenzhen, Quane said.

“Beijing has historically had the worst air pollution out of the 20 mainland Chinese cities that we look at,” he said.“Many of these senior executives are married and have children, who are much more affected by air pollution, so they need greater financial incentives to come.”

ECA recommends companies offer an extra 15-to-25 percent of base salary to top-level executives relocating to Beijing, compared with 10-20 percent for Shanghai.

“We definitely worry about young kids and elderly people with lung and heart diseases,” said Richard Saint Cyr, a doctor at theBeijing United Family Hospital. “Most people think it’s just lungs. But if you’re already on the edge with heart disease, and you’re out playing golf when the air pollution is really bad, it is a very high risk for having a heart attack.”

To contact Bloomberg News staff for this story: Daryl Loo in Beijing at

To contact the editor responsible for this story: Jason Gale at

Air Pollution Increases Risk of Cervical, Brain, and Lung Cancers

By Linda Fugate PhD

Created 12/12/2011 – 07:07

Urban air pollution from automobile traffic contains low levels of carcinogens in the form of ultrafine particles. Since large population numbers are exposed to this type of pollution, even a small increase in cancer risk can produce a significant number of cancer cases.

Ole Raaschou-Nielsen and colleagues in Denmark performed a study of 54,304 people exposed to different levels of air pollution over the time period 1971 to 2006.

“The airways are the primary target organs, but accumulating evidence from experiments in animals shows that ultrafine particles can translocate to other organs,” Raaschou-Nielsen explained. The research team collected records of 21 types of cancer over a period of 10 years. People who lived in areas with the highest air pollution numbers had elevated rates of cervical, brain, and lung cancers.

The participants were enrolled in the Danish Diet, Cancer, and Health cohort study. Air pollution was quantified by the concentrations of NO(x) molecules calculated from the Danish AirGIS modeling system. The researchers performed separate studies for lung cancer and for cancers of all other sites.

Lung cancer rates were 30 percent higher in participants who lived in the highest air pollution areas, compared with the lowest pollution areas. “The results indicated stronger associations among nonsmokers, among participant[s] with longer school attendance, and among those with relatively low dietary intake of fruit”, Raaschou-Nielsen reported.

Inhaled carcinogens can reach any part of the body through the bloodstream. In addition, Raaschou-Nielsen reported that ultrafine particles can reach the brain through the olfactory nerves that serve the nose. An inflammatory response may be one step in the development of brain cancer, which showed significantly increased rates in people exposed to the highest levels of air pollution.

The association between high automobile traffic and increased rates of cervical cancer was not explained by any known mechanism. Raaschou-Nielsen pointed out that the researchers had no information on rates of humanpapillomavirus (HPV) infection, which is recognized as a cause of cervical cancer.

“It is possible that HPV infection is more prevalent among women living in areas with heavy traffic and air pollution,” he noted. Further research is needed to determine whether it was the air pollution itself or some related factor that caused higher rates of cervical cancer.


1. Raaschou-Nielson O et al, “Air pollution from traffic and cancer incidence: a Danish cohort study”, Environmental Health 2011; 10: 67.

2. Raaschou-Nielson O et al, “Lung cancer incidence and long-term exposure to air pollution from traffic”, Environ Health Prespect 2011; 199: 860-865.

3. National Environmental Research Institute. AirGIS. Web. Dec. 6, 2011.

Reviewed December 12, 2011
by Michele Blacksberg RN
Edited by Jody Smith

Copyright © 2011 HW, LLC d/b/a EmpowHER Media unless otherwise noted. EmpowHER does not provide medical advice, diagnosis, or treatment.

Source URL (retrieved on 12/13/2011 – 07:57):

CTA was onair today

Vehicle engine-idling law /

On today’s Backchat, we look at the implementation of vehicle engine-idling laws that come into effect on Thursday