|  Theother secondhand smoke PM-10'sare the most dangerous component of woodsmoke -- particulatematter "splinters" so tiny, they bypass your bronchial filters, penetratingdeep into your lungs where they lodge and do their damage! http://burningissues.org Chosenas a site of educational excellence by the BBC in 1999. . | . |  Theother secondhand smoke PM-10'sare the most dangerous component of woodsmoke -- particulatematter "splinters" so tiny, they bypass your bronchial filters, penetratingdeep into your lungs where they lodge and do their damage! http://burningissues.org Chosenas a site of educational excellence by the BBC in 1999. | 
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|  Theother secondhand smoke PM-10'sare the most dangerous component of woodsmoke -- particulatematter "splinters" so tiny, they bypass your bronchial filters, penetratingdeep into your lungs where they lodge and do their damage! http://burningissues.org Chosenas a site of educational excellence by the BBC in 1999. . | . |  Theother secondhand smoke PM-10'sare the most dangerous component of woodsmoke -- particulatematter "splinters" so tiny, they bypass your bronchial filters, penetratingdeep into your lungs where they lodge and do their damage! http://burningissues.org Chosenas a site of educational excellence by the BBC in 1999. |