Negative ions have been linked directly and indirectly to better health. Negative ions have been shown to increase oxygenation of the lungs and lower complaints of general aches, pains, lethargy and depression. Additionally, investigators at the EPA have shown how particles charged by combining with negative ions tend to attach to grounded surfaces such as ceilings, walls, and floors. This electro-static attraction effectively removes otherwise inhalable airborne toxins (nitrates, sulfates, auto emissions and more) from your breathable air.