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WASHINGTON, Nov. 24 (Xinhua) -- A new study suggests that the rate of global warming from doubling of atmospheric carbon dioxide may be less than the most dire estimates of some previous studies.Authors of the study, which was funded by the National Science Foundation and published online on Thursday in the journal Science, say that global warming is real and that increases in atmospheric CO2 will have multiple serious impacts. However, the most Draconian projections of temperature increases from the doubling of CO2 are unlikely."Many previous climate sensitivity studies have looked at the past only from 1850 through today, and not fully integrated paleoclimate date, especially on a global scale," said Andreas Schmittner, an Oregon State University researcher and lead author on the Science article. "When you reconstruct sea and land surface temperatures from the peak of the last Ice Age 21,000 years ago -- which is referred to as the Last Glacial Maximum -- and compare it with climate model simulations of that period, you get a much different picture.""If these paleoclimatic constraints apply to the future, as predicted by our model, the results imply less probability of extreme climatic change than previously thought," Schmittner added.Scientists have struggled for years trying to quantify "climate sensitivity" -- which is how the Earth will respond to projected increases of atmospheric carbon dioxide. The 2007 IPCC report estimated that the air near the surface of the Earth would warm on average by two to 4.5 degrees (Celsius) with a doubling of atmospheric CO2 from preindustrial standards. The mean, or " expected value" increase in the IPCC estimates was 3.0 degrees; most climate model studies use the doubling of CO2 as a basic index.The researchers based their study on ice age land and ocean surface temperature obtained by examining ices cores, bore holes, seafloor sediments and other factors. When they first looked at the paleoclimatic data, the researchers only found very small differences in ocean temperatures then compared to now."Our study implies that we still have time to prevent that from happening, if we make a concerted effort to change course soon," said Schmittner.

BEIJING, Nov. 22 (Xinhuanet) -- Global AIDS deaths and new HIV infections have each dropped 21 percent since the peak of the AIDS pandemic in 1997, according to a UN report released Monday.One major factor responsible for the result is that life-saving HIV treatments have become more popular and got to 1.35 million more people in 2010 than in 2009.In middle-income and underdeveloped nations, these treatments have saved 2.5 million lives since 1995."We have seen a massive scale-up in access to HIV treatment, which has had a dramatic effect on the lives of people everywhere," said Michel Sidibe, executive director of the U.N. AIDS program.However, 53 percent of people who need HIV/AIDS treatments -- about 7.6 million people -- cannot get them, which accounted for 1.8 million AIDS deaths in 2010.There are now 34 million people living with HIV. And just in last year there were 2.7 million new infections.The decline in deaths and new infections means the AIDS pandemic is at a turning point, the UNAIDS report argues, adding smart investment can save millions of future deaths.

BEIJING, Dec. 25 (Xinhua) -- A total of 14,976 cases of medical disputes were handled by the country's emerging third-party mediation organizations, with over 80 percent of them being successfully settled, said Vice Health Minister Zhang Mao.Zhang told Xinhua recently in an exclusive interview that China has to date set up 1,358 third-party mediation organizations to settle medical disputes.The third-party mediation organizations have come into being since late 2009 which usually hire retired doctors, medical experts and lawyers to bridge the communication gaps between doctors and patients and direct patients to resort to legal means in settling medical disputes.The third-party mediation system for medical disputes is a latest reform to ease doctor-patient tension that sometimes escalate into violence.Such incidents erupted several times this year, and in an extreme case in September, a 43-year-old surgeon in Beijing Tongren Hospital was stabbed by a patient into serious injury. The attack was believed to have been triggered by a medical dispute in which the patient alleged that the surgeon had committed malpractice during an operation.

BEIJING, Jan. 05 (Xinhuanet) -- Tighter licensing and banning unlicensed food processors are two measures needed to improve the poor quality of cooked food in Guangzhou markets, says a new proposal.The proposal, to be presented to the Guangzhou committee of the Chinese People's Political Consultative Conference, notes that producers of unpacked cooked food currently only need to obtain a food circulation permit.Many of them process food in unlicensed workshops with poor sanitation, and some producers even use substandard materials in food processing.The annual session of the conference opens on Tuesday.Recent tests of unpacked cooked food found that of 100 samples of meat, flour-based food, preserved vegetables, soybean products and algae products, only 38 passed the inspection.No cold dried bean curd or cold algae products passed the tests, which were carried out at seven supermarkets in Guangzhou, Guangdong province, by the city's consumers' commission.Excessive microorganisms were the main reason for failing the tests. Fifty-five samples contained excessive coliform and 12 had golden staph.Meanwhile, in tests of unpacked cooked food at supermarkets in Guangzhou by the city's commerce authority in the third quarter of last year, only 28 of the 71 samples passed the tests. In addition to excessive bacteria, excessive use of coloring agents was also spotted.The situation at other markets, such as wet markets, is more worrying, says the proposal.It also suggests that separate cooked food processing areas be built in local markets, with closer scrutiny over them.Standards concerning the processing, storage and transport of those food products remain unspecified.Some supermarkets, on the other hand, have been lax in selecting suppliers and failed to install protective facilities in shelving the food.Given that a number of government agencies are involved in food safety work, the proposal suggests that a shared information platform be built to prevent loopholes.The food associations should also play a bigger role in supervising food enterprises, it says."Since cooked food goes through the production, transport and shelving steps, it is hard to guarantee the quality. Even packed food has quality problems, not to mention unpacked food," said Ding Honghui, a resident who was shopping at a supermarket in Guangzhou."As far as I know, many government departments are involved in safeguarding food safety. They should strengthen the supervision and work more closely," he said.