Why is a positive ion often surrounded by eight negative ions? - Quora
All about the benefits of negative ions
Amazon.com: Electrodepot Negative Ion Generator - 12V High Density Plasma ionizer Module - No More Mold Spores, Pollen, pet Dander, Odors, Cigarette Smoke, Bacteria, viruses, dust : Home & Kitchen
Are Negative Ions Good For You? - Vineyard Complementary Medicine
Four studies that provide interesting conclusions about negative ions in the sauna | SaunaTimes