The player used to present the movie is a Real Networks, G2 player. This player should be installed on your computer before viewing the movie. Ground level ozone is believed to be the most ubiquitous air pollutant and the cause of much injury to the biosphere.
Ozone is a toxic gas which is formed by a reaction between air pollutants and sunlight.
While the ozone layer in the upper atmosphere protects you from ultraviolet rays contained in sunlight, ozone that forms near the ground is a health hazard. Ground-level ozone affects the respiratory system and can be especially harmful to very young people, elder people, and those people with chronic lung disease. Although we have some control over sources of some of the ozone producing air pollutants, we have no control over the heat and sunlight that turn those pollutants into ozone. Near the ground, ozone is formed in a three-step process. Gasoline, paints and solvents evaporate, releasing reactive organic compounds.