London's ULEZ linked to faster lung function growth in children
A prospective cohort study (CHILL) compared lung function growth over five years in children in London, where the Ultra Low Emission Zone (ULEZ) was introduced, versus Luton, which had no clean air zone. The study reported that children in London, who started with lower baseline FEV1 and higher nitrogen dioxide exposure, showed 10 mL/year greater FEV1 growth than Luton children, with lung function reaching parity between the two sites after four years. The authors state this suggests prior deficits in lung development were restored and that the findings support wider implementation of clean air zones.
Most relevant for: School-aged children (6-9 years at baseline) living in urban areas with traffic-related air pollution exposure.
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