Thread: Full pollution protection 'pollen filter'
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Old 02-29-2012, 02:19 PM   #3 (permalink)
gone-ot
...beats walking...
 
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...human reaction to air pollutants is similiar to use of EGR in engines, colloquially referred to as "...sniffing your own pharts..." It won't kill you, but why would you do it?
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