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 For example, a report from the Committee on the Medical Effects of Air Pollutants quotes the median size of airborne dust from the air in London to range from 0.09 to 0.13 m.10of airborne tunnel dust from Holland Park station, showing the majority of the particles to be between 0.5 and 5 some of the larger ones being clumps of smaller particles.Open in new tabThe results at the three stations over three days are shown in table 1. Average PM2.5 concentrations ranged from 270 g/m3 to 480 g/m3, and corresponding particle number counts from 14 000 to 29 000/cm3. The lower number concentrations at Hampstead reflected lower above ground concentrations at that site. Young and HandsomeBeards that are well shaven will always make a man look young and handsome. If you must keep a beard or moustache, then have it well trimmed to keep it neat. When you shave, try as much to avoid nicking yourself because bruise marks on your face will not make you look good. Ambassador Federico Sales Lotfe, Am