Millions of cases of asthma in children are linked to traffic pollution
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Last Update: 2020-12-25
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Source: Internet
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Author: User
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a study published in The Lancet- Planetary Health, four million cases of childhood asthma worldwide each year can be attributed to nitrogen dioxide (NO2) from traffic pollution.
from vehicles can damage the respiratory tract, leading to inflammation and the development of asthma in genetically inclined children. Although it has not been determined which pollutants are caused, previous studies have shown that exposure to NO2 is a key factor, and that 80 percent of the city's exo-NO2 comes from traffic exhaust. Ploy Achakulwisut of George Washington University in the United States studied global data on NO2 concentrations and asthma incidence to estimate the number of new asthma cases that may be related to traffic pollution in children ages 1 to 18.
found that of the 194 countries, the UK had the 24th highest proportion of new cases of childhood asthma attributable to traffic pollution. Of these, new cases of asthma among children in Manchester and London accounted for 23 per cent and 29 per cent of the total cases in the country, respectively.
South Korea topped the list, with nearly a third of new diagnoses linked to NO2 exposure. 25 in the U.S. and 58 in India.
the team found that 92 percent of asthma cases in children exposed to traffic pollution occurred in areas where the average concentration of NO2 was lower than the World Health Organization's (WHO) guidelines (21 out of 1 billion).
"our study suggests that WHO guidelines for the average annual concentration of NO2 may need to be reconsidered, while controlling traffic emissions should be a key goal in reducing NO2 exposure. Susan Anenberg of George Washington University, a member of the team, said.
Achakulwisut believes the policy change could help improve traffic-related air pollution. "Recent examples include the electrification of all its bus teams in Shenzhen, China, and the start of congestion charges in London in ultra-low emission areas." (Source: Xu Xu, China Science Daily)
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