Ozone can irritate your respiratory system and trigger a number of health problems, mainly in the airways. It can reduce lung function,
harm lung tissue and it can worsen diseases like bronchitis, asthma and emphysema. As mentioned, studies have shown that long-term
exposure to ozone leads to about one million premature deaths annually.
Ground level ozone also has negative effects on crops and forests and in Sweden the costs for these effects are estimated to more than one billion per year
Ozone also contributes to global warming, partly because it's a green house gas itself, but also because it can reduce the CO2 uptake from forests with