American researchers examined more than 900 people aged 60 and over . Experts believe that air pollution could increase the risk of 'silent strokes ' Microscopic particles in pollution are thought to kill 29,000 people a year . Comment:
American researchers examined more than 900 people aged 60 and over . Experts believe that air pollution could increase the risk of 'silent strokes ' Microscopic particles in pollution are thought to kill 29,000 people a year . The risk of having a silent stroke can be raised by more than 40 per cent .