The Impact of Liquefied Petroleum Gas vs. Biomass Stove Use on Infant Respiratory Health
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Reviewed & Translated by Dat Tien Nguyen, B.A, ScM.
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Posted on February 26th, 2024
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Exposure to household pollutants contributes to 30% of pediatric pneumonia-related mortality. Prior observational research has linked exposure to particulate matter smaller than 2.5 micrometers to an elevated risk of pneumonia. Burning biomass, including wood and charcoal, generates these harmful substances. Given that many households in low and middle-income countries rely on biomass for cooking fuel, a study was undertaken to compare the respiratory effects of using liquefied petroleum gas (LPG) versus biomass.
The study was conducted across four different countries (India, Guatemala, Peru, and Rwanda), involving 3,061 infants residing in households that used a biomass stove at least four days a week. Approximately 10% of these children were also exposed to secondhand smoke. Half of the households were provided with cookstoves that utilized liquefied petroleum gas (LPG), while the other half continued to use biomass stoves. Exposure was monitored using meters installed near the stove and worn by the infants. After approximately 40 months of follow-up, the researchers observed that infants in households using LPG were exposed to an average of 24.2 μg of PM2.5 per cubic meter, which was lower than the 66.0 μg per cubic meter observed in households using biomass stoves. Despite the lower exposure to particulate matter smaller than 2.5 in households using liquefied petroleum gas, the incidence of pneumonia was similar to that of infants living in households using biomass stoves. The researchers attributed the null result observed in this study to increased protection against respiratory disease during the COVID-19 pandemic and noted that the PM2.5 level produced by LPG in this study was higher than in previous studies.
The study was conducted across four different countries (India, Guatemala, Peru, and Rwanda), involving 3,061 infants residing in households that used a biomass stove at least four days a week. Approximately 10% of these children were also exposed to secondhand smoke. Half of the households were provided with cookstoves that utilized liquefied petroleum gas (LPG), while the other half continued to use biomass stoves. Exposure was monitored using meters installed near the stove and worn by the infants. After approximately 40 months of follow-up, the researchers observed that infants in households using LPG were exposed to an average of 24.2 μg of PM2.5 per cubic meter, which was lower than the 66.0 μg per cubic meter observed in households using biomass stoves. Despite the lower exposure to particulate matter smaller than 2.5 in households using liquefied petroleum gas, the incidence of pneumonia was similar to that of infants living in households using biomass stoves. The researchers attributed the null result observed in this study to increased protection against respiratory disease during the COVID-19 pandemic and noted that the PM2.5 level produced by LPG in this study was higher than in previous studies.