Dangerous ozone

Ozone levels exceeded the safety limit on Monday in Lisbon, Almada, Barreiro, Coimbra and other municipalities in the north of Portugal, with the population warned of its dangers. The registered levels may be damaging to health, affecting particularly the more vulnerable groups such as children, the elderly, and people with lung and heart disease, and may lead to coughing, headaches, chest pains, shortness of breath and eye irritation.