What are causes of Negative Ion depletion?
Research has also shown that polluted areas both indoors and outdoors have very low levels of negative ions, and very high levels of positive ions. It would seem that all or most of the available negative ions had been used up in their fight with contaminants. The picture tubes (CRTs) in computer monitors and TVs also deplete the air of negative ions. So does the airflow through furnace ducts and air conditioning systems.
