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LOS ANGELES, April 27 (Xinhua) -- Air pollution poses a threat to the health of about 154 million Americans -- or more than half of the U.S. population, the American Lung Association (ALA) said on Wednesday.The air is so polluted in some areas that it is often dangerous to breathe, the ALA said in its annual report on air quality across the United States.About 48 percent of U.S. residents live in counties where smog (ozone) is too high, 20 percent live in areas where there are too many short-term spikes in pollution and six percent live in areas with harmful year-round soot (particle pollution), said the report.About 17 million Americans live in areas afflicted by all three air pollution hazards, the report noted.The report listed California as the most polluted state, where people are breathing some of the worst air.Compared with other states, California has more polluted places, including Los Angeles, Long Beach, Riverside, Bakersfield and Fresno, the report said.Honolulu in Hawaii and Santa Fe-Espanola in New Mexico are the only two cities in the nation that had no days in which smog and soot levels reached unhealthy ranges, making them the cleanest cities in the nation, said the report.Research suggests air pollution threatens human health -- and not just the lungs.Small particles of pollution can lodge deep in the lungs, triggering an inflammatory process that, over time, can spread elsewhere in the body and damage blood vessels and the heart, according to Dr. Norman Edelman, the ALA's chief medical officer.On days in which smog levels spike, there's an increase in hospital admissions for respiratory illnesses, heart attacks and stroke in the two or three days following it, said Michael Jerrett, a professor of environmental health sciences at University of California, Berkeley's School of Public Health.In addition to posing both long-term and short-term risks, pollution can also contribute to low birth weights, diabetes, cardiovascular disease, heart attack, stroke and, ultimately, shorter life spans, he warned.

BEIJING, Feb. 23 (Xinhua) -- A senior official of the ruling Forces pour la Defense de la Democratie (FDD) of Burundi said Tuesday the FDD hopes to strengthen cooperation with the Communist Party of China (CPC) and to further enhance the "brotherly friendship" with the CPC.Mohamed Rukara, vice president of the Council of Elders, the top decision-making body of the FDD, said in an interview with Xinhua that there are a lot of ruling experiences of CPC that the FDD can learn from.He said the CPC has gained great achievements in China's reform and opening up, realizing sustainable development, developing science and technology and striking corruption.He said Burundi has set "sustainable development" as the slogan for the 2010-2015 period, and he believed that his country can learn from China's successful experiences of reform and opening up and realize the goal of shaking off poverty by 2020-2025.Rukara, who is also a ombudsman, said corruption has been a big challenge facing his country, and he believed the FDD can learn from the CPC in this regard, as the latter has been combating corruption very hard and effectively.Appreciating China's aid and contribution to the development of Burundi, Rukara said the two parties and the two countries have had very good relations based on mutual respect.He welcomed more Chinese enterprises to invest in Burundi to support its development, and "the door will always be open to our brother."At the invitation of the CPC, Rukara is heading an FDD delegation for a visit to China starting from Saturday.

BEIJING, Feb. 10 (Xinhua) -- More than 9,300 kidnapped children in China have been rescued since April 2009 since a nationwide campaign was launched to crack down on human trafficking, according to the Ministry of Public Security Thursday.In a statement, the ministry encouraged the involvement of civilians in providing clues to help the police rescue minors -- especially those being abused and forced to beg on the streets.In less than three weeks, a Chinese microblog called "Street Photos to Rescue Child Beggars" attracted 175,000 followers and posted more than 2,500 images of begging children online for parents to identify.The blog was set up last month by a professor with the Rural Development Institute of the Beijing-based China Academy of Social Sciences. It has helped rescue six children so far.However, the ministry noted in the statement that children kidnapped to become beggars took up only a small portion of all cases of child beggars. In most cases, children were taken to beg along with their parents or relatives.The ministry has urged police authorities across the country to closely cooperate with civil affairs, urban management and health departments in apprehending people who force children to become beggars.

BEIJING, May 10 (Xinhuanet) -- Autism spectrum disorder may be under diagnosed and under reported worldwide and rigorous screening is needed for accurate estimates, said researchers in Monday's American Journal of Psychiatry.Researchers from the Yale Child Study Center, George Washington University and other leading institutions screened every child aged 7 to 12 in Ilsan district of the city of Goyang, a community of 488,590 in South Korea, and found more than two-thirds of ASD cases in the mainstream school population unrecognized and untreated.They estimated the prevalence of ASD in South Korea to be 2.64 percent, or approximately 1 in 38 children.The figure is more than twice the rate usually reported in the developed world. Even that rate, about 1 percent, has been climbing rapidly in recent years — from 0.6 percent in the United States in 2007, for example.“From the get-go we had the feeling that we would find a higher prevalence than other studies because we were looking at an understudied population: children in regular schools,” said the lead researcher, Dr. Young-Shin Kim, a child psychiatrist and epidemiologist at the Yale Child Study Center.By contrast, other research groups measure autism prevalence by examining and verifying records of existing cases kept by health care and special education agencies, but leaving out many children whose parents and schools have never sought a diagnosis.Kim said the researchers concluded autism prevalence estimates worldwide may increase if rigorous screening and comprehensive population studies are used to produce prevalence estimates.But it is suggested the findings did not mean that the actual numbers of children with autism were rising, simply that the study was more comprehensive than previous ones.

BEIJING, March 29 (Xinhuanet) -- A new study has found that rejection can literally hurt in the same way as physical pain does, according to media reports Tuesday.Researchers found that intense emotional pain, such as feelings of rejection after a breakup of a relationship, can trigger brain activities similar to when people suffer physical pain.The research findings were published in Tuesday's Proceedings of the National Academy of Sciences.The study followed 40 volunteers who experienced unwanted romantic breakups in the past six months, and the researchers analyzed their brain activity during two "painful" situations.The results showed that the two situations, thinking about the loss of their ex-partner and experiencing mild physical pain similar to holding a very hot coffee cup, caused response in the overlapping parts of the brain."This tells us how serious rejection can be sometimes," said study author Edward E. Smith, director of cognitive neuroscience at Columbia University. Smith added. "Our ultimate goal is to see what kind of therapeutic approach might be useful in relieving the pain of rejection."