Traffic pollution linked to 9% of new Irish childhood asthma cases

Researchers estimate that four million new cases of childhood asthma globally - 13% of those diagnosed - could be attributable to nitrogen dioxide pollution.

Just under one in 10 cases of Irish childhood asthma is linked to traffic pollution.

Exposure to nitrogen dioxide, which is mainly emitted from road transport, appears to be a "substantial" risk factor for the condition, according to a study in journal The Lancet Planetary Health.