Even low air pollution levels can up asthma risk

A study found that even these are associated with increased risk of asthma and poor lung function in adults

Air pollution can increase the risk of asthma in adults, even at low levels, a study has warned.
 
Researchers found that Australians aged 45-50 who lived less than 200 metres from a major road had a 50 per cent higher risk of asthma, wheeze and lower lung function over a five-year period than those who lived more than 200 metres from a major road.
 
They noted that the increase in these health issues was despite Australia’s relatively low safe nitrogen dioxide (NO2) limit of 30 parts per billion per year.
 
The study surveyed about 700 participants from