Denmark. Boffi et al. (2006) measured OTS respirable particle pollution in a car park (open space), outdoors in front of a conference center with smokers under a roof (18 smokers during a measurement time of 35 min), indoors in the nonsmoking conference center, along the motorway to Copenhagen city centre, and inside a Copenhagen restaurant where smoking was allowed. Boffi et al. (2006) found that mean values observed with smokers in front of the conference center were significantly higher than the outdoor parking place, indoor conference center, motorway and Copenhagen outdoor official data. • Finland. .
