Air pollution
Red Alder leaf, showing the typical discolouration caused by ozone pollution.[22]
There is a great deal of evidence to show that high concentrations of ozone, created by high concentrations of pollution and daylight UV rays at the Earth's surface, can harm lung function and irritate the respiratory system.[15][23] A connection has also been known to exist between increased ozone caused by thunderstorms and hospital admissions of asthma sufferers.[24] Air quality guidelines such as those from the World Health Organization are based on detailed studies of what levels can cause measurable health effects. Exposure to ozone and the pollutants that produce it has been linked to premature death, asthma, bronchitis, heart attack, and other cardiopulmonary problems. According to scientists with the United States Environmental Protection Agency (EPA), susceptible people can be adversely affected by ozone levels as low as 40 ppb.[25]
we have an ozone generator at our shop as a deodorizer for contents contaminated by fire.