The main differences in the air between healthy outdoor environments and unhealthy or harmful outdoor environments are the levels of negative ions, ozone, and pollutants. Healthy environments have higher levels of negative ions, moderate levels of ozone, and low levels of particles and/or pollutants. Unfortunately, environments inside the automobile are more similar to unhealthy and hazardous outdoor environments. This includes negative ion, ozone, and pollutant levels.

Negative Ion and Ozone Levels in Healthy and Unhealthy Environments
    As an example, in healthy outdoor environments such as in the mountains, or in a country meadow, the negative ion concentration is typically 2000 to 4000 negative ions per cubic centimeter. This is why environments within the vehicle need a source of negative ions and ozone. In addition to being beneficial to your health when occurring at proper levels, they are highly effective at removing particles and contaminants from the air, which results in a much healthier environment by itself.
    By contrast, the negative ion concentration in an unhealthy place, such as automobiles driving on congested freeways, is less than 100 negative ions per cubic cm. The negative ion concentration in most indoor environments is between 100 and 200 negative ions per cubic cm. which is the level that can be achieved inside the vehicle with the AromaMAX Ionizers.

Many Benefits of Negative Ionization
Asthma, Allergies, and other Respiratory Problems & Illnesses.
    Migraine Headaches. Inhaling negative ions prevents the production of Serotonin inside the brain. The overproduction of Serotonin inside the brain is the cause of migraine headaches.
    Depression. A study at Columbia University suggested that negative ion treatment is more effective than anti-depressant drugs such as Prozac and Zolof, and there are no side effects with negative ions.
    Fatigue. The production of Serotonin (chemical produced inside the brain) also causes fatigue, and negative ions prevent the production of Serotonin inside the brain.
    Sleep. A study in France found that negative Ionizers helped people to sleep better, by preventing the production of the chemical Serotonin in the brain.
    Mental Performance and Concentration. Several tests have shown people exposed to negative ion treatment perform much better in mentally oriented activities than those who are not.
    Physical Performance. Due to test results performed by Russian scientists, negative Ionizers were always installed in the locker rooms and resting places for the Russian athletes.