BBC: Air pollution is contributing to about 40,000 early deaths a year in the UK, say the Royal Colleges of Physicians and of Paediatrics and Child Health.
They say emissions from diesel engines have been poorly controlled and indoor air pollution has been overlooked.
Tobacco still poses the biggest indoor threat, but wood-burning stoves, spray deodorants, cleaning products, air fresheners and fly spray contribute.
Mould and mildew in poorly ventilated rooms can also cause illness.
"Being...