​Air pollution damages arteries of even healthy young adults, new study shows.

Tiny particles produced by burning fossil fuels were thought to be mainly a problem for young and elderly people with medical conditions. 

Tiny particles of air pollution can damage the inner lining of veins and arteries in young and healthy people, putting them at greater risk of heart disease, stroke and high blood pressure, according to new research.Air pollution is thought to cause the premature deaths of about 40,000 people a year in the UK, with children and older people with medical conditions thought to be the most at risk. But the new study suggests that healthy people in their twenties are also being harmed by the particles.