Most surface ozone contributing to premature mortality in European countries is imported, study shows

Exposure to current levels of ground-level ozone (O3) in Europe is one of the main causes of premature mortality due to air pollution, especially in summer. Exposure to current levels of ground-level ozone (O3) in Europe is one of the main causes of premature mortality due to air pollution, especially in summer. Environment Phys.org – latest science and technology news stories