Activated carbon filters adsorb cigarette smoke, VOCs (volatile organic compounds) , and similar small particles that a True HEPA filter struggles to capture because they are too small
The Ministry of Commerce allocated them nationwide according to the principle of "catering to special needs, catering to remote areas, while also taking general needs into account." After the Shanghai Cigarette Factory began producing filter-tipped "Chunghwa" cigarettes, the first sample cigarettes were delivered to the central authorities by a special envoy from the Municipal Tobacco and Sugar Company
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LEDs activate the catalytic process, generating hydroxyl radicals which oxidize pollutants, including cigarette smoke chemicals, and breaking them down into basic components of water vapor and carbon dioxide
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