AIR pollution is putting millions of us at risk from serious lung disease, a new study has concluded. Scientists looked at more than 300,000 people and found that exposure to outdoor air pollution can age our lungs by two years and put us at risk of developing chronic obstructive pulmonary disease (COPD). COPD, which causes an inflammation in the lungs and a narrowing of the airways, is the third leading cause of death worldwide. Experts predict that the number of global COPD deaths will increase over the next ten years. Anna Hansell is Professor of Environmental Epidemiology in the Centre for Environmental Health and Sustainability at the University of Leicester, UK, and was part of the research team.