study:A prior study by the GW researchers discovered that NO2 contributed to around 13% of global pediatric asthma cases. About 50% of these cases occurred in the 250 most populated cities worldwide.
People living near congested roadways and industrial sites are at the highest risk of developing asthma.Overall, the number of pediatric asthma cases associated with NO2 fell from 20% in 2000 to 16% in 2019.
This decline means that initiatives to clean the air in Europe and the US have paid off, particularly for children living with asthma.Of course, there’s more work ahead for both higher-income countries and developing countries.
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