Ozone

Ozone peaks are a common occurrence in hot weather. Ozone (O₃) is a gas found in the Earth's upper atmosphere. It retains heat in the atmosphere and protects us from the sun's ultraviolet rays.

However, ozone is also formed in the atmosphere around us when solar radiation interacts with nitrogen oxides and volatile organic compounds from pollution caused by vehicles and industrial activity. It is a secondary pollutant. Prolonged exposure to high concentrations of ozone is associated with an increase in mortality from respiratory and cardiovascular diseases.

Ozone peaks

The ozone that we breathe can irritate the respiratory tract and eyes. It causes respiratory problems, irritates the eyes and exacerbates asthma, emphysema and chronic obstructive pulmonary disease.

Advice on protecting yourself from ozone peaks

• Close your windows when ozone levels are high – particularly in the afternoon, when they are at their highest.
• Accordingly, plan sporting activities (hikes, bike rides etc.) for the morning or evening. Generally, ozone levels are lower then compared with in the afternoon.
• Do not force anyone who complains of problems due to ozone to engage in more physical effort: any irritation of the lungs and other mucous membranes increases as activity becomes more intense.
• Consult your doctor if you frequently suffer from problems related to ozone.