Poor air quality costs Europe more than €700 million per year, in health expenditures and loss of economic performance, according to official EU sources.

We are all exposed to polluted air. Among main air pollutants are nitrogen oxides —the so-called ‘NOx ‘— and ozone , which cause irritation of respiratory tract and eyes, favouring cough, lung infections in children and asthma.

Air quality is a public health issue. As recently as last October, the World Health Organisation classified global outdoor air pollution as ‘ carcinogenic to humans .