Negative ions are Positive Particulate Matter Mortality – California Environmental Protection Agency Facts about Fine Particle Air Pollution – American Lung Association “Even non-smokers are affected by dreaded lung disease” – Dagens Nyheter “Dangerous Duo: Ultrafine particles aggravate allergic reactions” – GSF “How Ultrafine Particles in Air Pollution may cause Heart Disease” – Science Daily Cardiovascular effects of exposure to diesel exhaust – UMEÅ UNIVERSITY MEDICAL DISSERTATION EPA Identifies Noise Levels Affecting Health and Welfare – US Environmental Protection Acency (EPA) Influence of Negative Air Ions on Drivers – Toyota Exposure to Particulate Air Pollution and Risk of Deep Vein Thrombosis – American Medical Association. A Controlled Trial of Timed Bright Light and Negative Air Ionization for Treatment of Winter Depression – American Medical Association. Ambient Particulate Pollutants in the Ultrafine Range Promote Early Atherosclerosis and Systemic Oxidative Stress – American Heart Association. Ultrafine Particles: Characterization, Health Effects and Pathophysiological Mechanisms – US Environmental Protection Agency (EPA)