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CHINA/
RTR3KR4P 
April 10, 2014 
People assemble home made air purifiers during a workshop organized by Smart Air Filters at a local coffee... 
Shanghai, China 
People assemble home made air purifiers during a workshop organized by Smart Air Filters at a local coffee... 
People assemble home made air purifiers during a workshop organized by Smart Air Filters at a local coffee shop in Shanghai April 10, 2014. Thomas Talhelm, a PhD student in cultural psychology at the University of Virginia, and founder of Smart Air Filter, began experimenting with HEPA (high-efficiency particulate air) filters and a simple plastic fan to remove tiny but hazardous particulates, called PM 2.5, from the air indoors. His air purifier kits, costing just 200RMB ($32) compared to top-of-the-line purifiers that cost up to $8,000, according to organizers, provide a low-cost solution to China's air pollution problem. Experts said chronic exposure to particle pollution can aggravate asthma, increase the risk of heart disease and even shorten life. REUTERS/Carlos Barria (CHINA - Tags: ENVIRONMENT SOCIETY SCIENCE TECHNOLOGY) 
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