Ozone (O₃)

Sources of ozone

There are no major emission sources of ozone itself. Reactions between other pollutants form ozone in the air. For example, when pollutants from cars, power stations and factories react with sunlight.

Ground level ozone can be at unhealthy levels on both hot and cold days. It can travel by the wind, affecting both urban and rural areas.

Health effects

Short term exposure to ozone can cause:

• shortness of breath, wheezing and coughing
• asthma attacks
• increased risk of respiratory infections
• irritation of eyes, nose and throat

Long term exposure to ozone may lead to:

• increased respiratory illnesses
• nervous system issues
• cancer
• heart issues