Low levels of traffic pollution can harm healthy adults.
Traffic fumes are linked to respiratory diseases.
Traffic pollution has been blamed for tens of thousands of deaths every year across Europe.
Car exhausts pump out a noxious combination of chemicals � cause of cancer
Impact on blood pollution can cause breathing difficulties
Car fumes worsen symptoms for asthma and COPD sufferers
Traffic pollution �kills thousands�
Pollution takes toll on healthy adults
Traffic fumes are blamed for much pollution
City dwellers 'dying younger'
The invisible, odourless, killer
Research published in the Lancet Medical Journal in September 2000 estimates that 6% of deaths per year in Austria, France and Switzerland are due to air pollution.
The researchers also estimated that in their countries alone that car fumes causes 300,000 extra cases per annum of bronchitis in children, and 15,000 extra hospital admissions for heart disease made worse by the pollution.
Bill runs into billions
They calculated that the cost of dealing with all this at the time was �27 billion per year.