Ozone

Ozone is a molecule consisting of three (3) oxygen atoms. It is a pale blue gas at room temperature, with a distinctive chlorine-like scent, it is detectable at 0.01 ppm to most humans. Exposure of 0.1 to 1 ppm produces headaches, burning eyes, and irritation to the respiratory passages.

Ozone in the atmosphere
The highest levels of ozone are contained in the stratosphere (10-50 km above the surface). Ozone filters out photons with less than 320 nm wavelengths, also known as ultraviolet waves or UV waves. These rays play a large part in the development of skin cancer. Ironically, these same rays are an essential part of Vitamin D production.