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Distribution of negative oxygen ion concentration in different ecological environments

BoYan Li

Distribution of negative oxygen ion concentration in different ecological environments

 

 

 Environment places concentration Environment places concentration
forest or waterfall 10000-20000 City Park 200-1000
mountain or beach 5000-10000 street greening zone 400-600
the country field 1000-5000 office 100-400
Park 400-1000 City room 40-50
wilderness, suburb 100-1000 Industrial zone 0

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