Journal
ENVIRONMENTAL POLLUTION
Volume 290, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2021.117997
Keywords
Household air pollution; Improved biomass cookstoves; Chimney stoves; Blood pressure; Particulate matter; Carbon monoxide
Categories
Funding
- RCSI -Bahrain [117/15-Dec-2020]
- Irish Research Council [COALESCE/2020/13]
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This study reviewed the impact of improved biomass cookstoves on air quality and blood pressure in low-middle income households. The results showed that interventions led to significant reductions in CO, PM2.5, SBP, and DBP, with the most effective reductions seen in cookstoves with a chimney feature.
Objectives: This systematic review and meta-analysis evaluates the most recent evidence to examine whether use of improved biomass cookstoves in households in low-middle income countries results in reduction in mean concentrations of carbon monoxide (CO) and particulate matter of size 2.5 mu m (PM2.5) in the cooking area, as well as reduction in mean systolic (SBP) and diastolic blood pressure (DBP) of adults using the cookstoves when compared to adults who use traditional three stone fire or traditional biomass cookstoves. Methods: We searched databases of scientific and grey literature. We included studies if published between January 2012 and June 2021, reported impact of ICS interventions in non-pregnant adults in low/middle-income countries, and reported post-intervention results along with baseline of traditional cookstoves. Outcomes included 24- or 48-h averages of kitchen area PM2.5, CO, mean SBP and DBP. Meta-analyses estimated weighted mean differences between baseline and post-intervention values for all outcome measures. Results: Eleven studies were included; ten contributed estimates for HAP and four for BP. Interventions lead to significant reductions in PM2.5 (-0.73 mg/m(3), 95% CI: -1.33, -0.13), CO (-8.37 ppm, 95%CI: -13.20, -3.54) and SBP (-2.82 mmHg, 95% CI: -5.53, -0.11); and a non-significant reduction in DBP (-0.80 mmHg, 95%CI: -2.33, 0.73), when compared to baseline of traditional cookstoves. Except for DBP, greatest reductions in all outcomes came from standard combustion ICS with a chimney, compared to ICS without a chimney and advanced combustion ICS. Conclusion: Among the reviewed biomass stove types, ICS with a chimney feature resulted in greatest reductions in HAP and BP.
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