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Survey table of anions' concentration(2007-1-4 22:26:12)

 
 Amblence
 CONCENTRATION
 Waterfall and forestry
 50,000 ions/cc
 High mountain and seashore
 5,000 ions/cc
 Outskirts and fields
 700_1,500 ions/cc
 Metropolitan park 
 400_600 ions/cc
 Boulevard
 100_200 ions/cc
 Apartment in metropolis
 40_50 ions/cc
 Tight air_conditioned room
 0_25 ions/cc
                      

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