Higher air pollution in the UK trigger hundreds more heart attacks, strokes and acute asthma attacks each year, research suggests.
A team at King’s College London looked at data from London, Birmingham, Bristol, Derby, Liverpool, Manchester, Nottingham, Oxford and Southampton.
They calculated days with above average pollution levels would see an extra 124 cardiac arrests over the year.
NHS England boss Simon Stevens said it was evidence of “a health emergency”.
The figure is based on ambulance call data and does not count heart attacks suffered by patients already in hospital.