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...optimistic projections of an air turnaround for the Olympics are based in part on the results of previous exercises in barring cars from the streets of the capital. During a Sino-African summit in 2006, vehicle restrictions were enacted that removed about 800,000 of Beijing's then 2.8 million cars. The restrictions, which were put in place for three days, were "remarkably successful" and led to a 40% drop in nitrogen oxides, according to a study conducted by researchers from Harvard University and the Royal Netherlands Meteorological Institute...
...streets. "By July 20, not only the traffic control will be at ... full scale, [but] all the other controlling measures should in place," says Zhu Tong, an environmental-science professor at Peking University. "With all these controlling measures working at the same time, I am confident that the air quality in Beijing should be significantly improved...
...unlike the 2006 and 2007 tests, which ran for just three and four days, respectively, this year's limitations will have been in place for nearly three weeks when the Olympics kick off. Hao says he expects to see clearer skies within one week. "After a few days, the air quality will be improved," he says. "How many days? That depends on the weather...
...Sept. 6-17 Paralympics, then end on Sept. 20. "The measures are only a short-term fix," says Wen Bo, China director for the NGO Pacific Environment. "I think the current Beijing government couldn't have the time and energy to think of long-term solutions for fixing air pollution...
...counterparts stationed there. U.S. and Afghan government forces returned fire, but the mud brick walls of the village houses absorbed the impact of incoming bullets, and the Taliban kept the barrage coming, breaching the outer security ring and fighting hard until noon. The Americans called in mortars and close air support; Apache attack helicopters and fixed-wing aircraft responded with fire from the sky. The Taliban were finally driven back, reportedly suffering more than 40 casualties. But nine American soldiers also lost their lives...