BBC: Air pollution is linked to increased risk of developing an irregular heartbeat and blood clots in the lung, research suggests.
The impact of air pollution on the risk of heart attack and stroke is less clear, say UK experts.
Analysis of data from England and Wales shows air pollution is particularly harmful in the elderly.
Further research is needed on pollution and cardiovascular health, says the British Heart Foundation.
A team at the London School of Hygiene & Tropical Medicine analysed...