In fresh country air we find up to 4,000 negative ions per cubic centimetre (cm 3 ) - the size of a sugar cube.
Near strong surf or close to a waterfall up to 10,000 negative ions per cubic centimetre (cm 3 ) can be found .
In fresh country air we find up to 4,000 negative ions per cubic centimetre (cm 3 ) - the size of a sugar cube.
Near strong surf or close to a waterfall up to 10,000 negative ions per cubic centimetre (cm 3 ) can be found .
the number of negative ions in major capital cities at rush hour does not even reach 100 per cubic centimetre (cm 3 )
Scientific tests have revealed that the ratio of negative to positive ions should be between 1.02 to 0.98 and the air's composition of negative ions should range between 1000-1500 per cubic centimetre (cm 3 )
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