Abstract
Emissions from household cooking technologies constitute a significant source of household air pollution in developing countries. Household air pollution is estimated to be the leading cause of various health problems and mortality. Studies on household air pollution and health impacts are limited in Kenya. Therefore, this study quantified household particulate matter (PM1, PM2.5, PM10) and carbon monoxide (CO) from different cooking fuels and technologies and modelled their impact on health. A control test was conducted in one kitchen, while the field test was conducted in 42 randomly selected households. Particulate matter and CO monitoring were done using the multifunctional air quality detector EGVOC-180 and a carbon monoxide meter, respectively, for the cooking duration. Simulation of health impacts was done using the AirQ + v 2.1 model. Kitchen PM1, PM2.5, PM10, and CO were observed to be higher for biomass cookstoves (three stone cookstove, improved cookstove (chepkube), ceramic jiko, and sawdust jiko) than for non-biomass cookstoves (kerosene stove, liquefied petroleum gas (LPG), and electric cooker) during the cooking period. The average maximum PM2.5 concentrations for the cookstoves were three stone (481.2 μg/m3 ± 119.9 μg/m3), improved cookstove (chepkube) (304.3 μg/m3 ± 82.7 μg/m3), ceramic jiko (162.4 μg/m3 ± 40.3 μg/m3), sawdust jiko (273.1 μg/m3 ± 84.9 μg/m3), kerosene stove (80.2 μg/m3 ± 14.3 μg/m3), LPG (36.3 μg/m3 ± 6.5 μg/m3), and electric cooker (29.5 μg/m3 ± 5.6 μg/m3). The AirQ + model results showed that approximately 484 mortality cases due to acute lower respiratory infection (ALRI), chronic obstructive pulmonary disease (COPD), ischemic heart disease (IHD), and lung cancer could be averted if households switch from biomass cookstoves (three stone) to clean cooking technologies (LPG and electricity).
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Data availability
The datasets used during the current study are available from the corresponding author on request.
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This work was supported by the World Bank and the Government of Kenya under the Kenya Climate-Smart Agriculture Project.
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by [Cohen Ang’u]. The first draft of the manuscript was written by [Cohen Ang’u], and all authors commented on previous versions of the manuscript. The work was supervised by [Nzioka J. Muthama, Mwanthi A. Mututku, and Mutembei H. M’Kiugu]. All authors read and approved the final manuscript.
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The study in which this work was part of was granted ethical clearance by the University of Nairobi and Kenyatta National Hospital (UoN-KNH) ethics and research committee (Protocol number P34/01/2021, Approval date: 21 May 2021). Written informed consent was sought from all the respondents who participated in this study.
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Ang’u, C., Muthama, N.J., Mutuku, M.A. et al. Household air pollution and its impact on human health: the case of Vihiga County, Kenya. Air Qual Atmos Health 15, 2255–2268 (2022). https://doi.org/10.1007/s11869-022-01249-1
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DOI: https://doi.org/10.1007/s11869-022-01249-1