Qualité de l’air 
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holger gross
Individuel
1 Station
10 Followers
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www.holgergross.seA propos
I am a building engineer, born in 1943 and living on the island Gotland in Sweden. One of my interrests is air quality, outdoors as well as indoors.
Stations
Ammonitgatan
Visby, Suède
33
IQA É.-U., Metric