This year the World Heart Federation (WHF) is raising awareness of an increasingly important CVD risk factor: air pollution. World Heart Day takes place this Saturday. The latest scientific evidence by Nature warns that exposure to nitrogen dioxide and fine particulate matter air pollution is clearly linked to CVD mortality. Poor air quality is also ranked as the 4th cause of Disability-Adjusted Life Year (DALY) – one lost year of ‘healthy life’ – according to latest Global Burden of Disease study .