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.
Low-income areas usually find it challenging to lower dangerous vehicle emissions and other sources of NO2 due to costs and technology constraints. ADVERTISEMENT In another study by Veronica Southerland at GW, Anenberg and colleagues discovered that urban air pollution caused 1.8 million excess deaths in 2019.
This study also found that 86% of adults and children living in cities worldwide get exposed to unsafe levels of fine particulate matter. In fact, pollutant levels often exceed the recommendations from the World Health Organization.Their paper states: “Despite progress in reducing exposure in some countries, the global health burden of ambient fine particulate matter (PM2.5) is increasing annually.
Long-term exposure to PM2.5 is associated with premature mortality from various diseases, including cardiovascular disease, respiratory disease, lung cancer, and lower respiratory infection. PM2.5 is now the leading environmental contributor to the global burden of disease, rising from being the fifth leading contributor among environmental risk factors in 1990, in part driven by declines in
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