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A dome inflated with purified air is seen near an outdoor field on a smoggy day at the Western Academy of Beijing February 26, 2014. The dome, named the Tiger L'Air, holds four tennis courts and was set up last November for students to practice in. With a monthly cost of 55,000 yuan ($9,000), the dome pumps in outside polluted air and cleans it with high-efficiency particulate absorption (H.E.P.A) filters. [Photo/Agencies]
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Related:Beijing lifts heavy air pollution alert
Beijing lifts its orange alert for heavy air pollution at 12 am Thursday as a strong cold front has arrived on Wednesday night and is expected to disperse the week-long smoggy weather.[More]
