Yes, but only when occurring in extremely high concentrations - much higher than what an ozonating air purifier is capable of producing. Ozone is much like any other element in that it has its range of effects. It is harmless and useful at moderate concentrations, but harmful at extremely high levels. Take table salt for example, which provides essential fortification for nerve cells and the kidneys, and prevents heat stress disorders at lower concentrations.

No. The most stringent government standards for indoor ozone are those of the Food and Drug Administration for indoor medical devices, which specify that ozone output be no more than .05 ppm. In a closed test room with the Blueair 501 in operation, probes measured ozone levels at .003 ppm-a tiny fraction of the amount deemed hazardous to human health. Our design safeguards against excessive ozone production, and then removes ambient ozone particles from the air.

EPA's answer: "The same chemical properties that allow high concentrations of ozone to react with organic material outside the body give it the ability to react with similar organic material that makes up the body, and potentially cause harmful health consequences. When inhaled, ozone can damage the lungs. Relatively low amounts can cause chest pain, coughing, shortness of breath, and, throat irritation.

Yes. If this is occurring, you probably are using too much ozone. However, you can run the off gas through carbon to destroy the excess discharge.

Without special safety precautions, the laser can be dangerous. However, we ensure patient as well as health care worker safety by: 1. providing safety glasses for everyone in the room; 2. using the lowest effective settings possible; and 3. only allowing the doctor to perform the procedure as per the State Board of Medical Examiners. At the very low energy settings we use to treat spider veins, the danger is minimal. Treatment for vein problems have advanced dramatically over the past 5 years.

Ozone is a molecule composed of three atoms of oxygen. Two atoms of oxygen form the basic oxygen molecule--the oxygen we breathe that is essential to life. The third oxygen atom can detach from the ozone molecule, and re-attach to molecules of other substances, thereby altering their chemical composition. It is this ability to react with other substances that forms the basis of destroying bacteria, viruses and odors in nature.

Between 80 percent and 90 percent of patients get better on their own in about a week. The other 10 percent to 20 percent get worse, with many ending up in intensive care and requiring mechanical ventilators to help them breathe. About 6 percent die.

Some advanced techniques of Yoga can be dangerous if practiced without proper preparation and the guidance of a qualified teacher. Fortunately, such techniques are generally inaccessible to unprepared students. For this reason, it is very important to respect the process of initiation and transmission of yogic teachings.