A US and Canadian team have estimated 1.85 million new childhood asthma cases were linked with exposure to nitrogen dioxide in 2019, 8.5 per cent of all new cases that year.
, mainly due to richer countries cleaning up their air through emissions standards for vehicles and industry.The fraction of new paediatric asthma cases that are attributable to NOHowever, the researchers show how unevenly the burden today falls on cities and poorer countries. About two-thirds of the linked asthma cases are in urban areas.
And while high-income nations saw NO-associated cases fall by 41 per cent – driven largely by North America – south Asia and sub-Saharan Africa saw them rise.
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