2.9 billion people lack access to clean cooking fuels and technologies. This review analyzes the literature on affordability as a barrier to adoption and consistent use of clean cooking stoves and fuels. We find diverse frameworks, definitions and metrics in use, and frequent discussions on stove price, fuel costs, microfinance, and smaller procurement quantities. We recommend that financing strategies to mitigate unaffordability be based on how low-income households actually earn, spend, and save their money, and that affordability frameworks be expanded to account for gender divides, rural/urban divides, and stove stacking behavior. Our review thus aims to reflect the nuances of a low-income household's ability to pay for clean fuels. Affordability must make sense within the lived experiences of the poor if clean cooking is to achieve universal access.
Nearly three billion people in low- and middle-income countries (LMICs) rely on polluting fuels, resulting in millions of avoidable deaths annually. Polluting fuels also emit short-lived climate forcers (SLCFs) and greenhouse gases (GHGs). Liquefied petroleum gas (LPG) and grid-based electricity are scalable alternatives to polluting fuels but have raised climate and health concerns. Here, we compare emissions and climate impacts of a business-as-usual household cooking fuel trajectory to four large-scale transitions to gas and/or grid electricity in 77 LMICs. We account for upstream and end-use emissions from gas and electric cooking, assuming electrical grids evolve according to the 2022 World Energy Outlook’s ‘Stated Policies’ Scenario. We input the emissions into a reduced-complexity climate model to estimate radiative forcing and temperature changes associated with each scenario. We find full transitions to LPG and/or electricity decrease emissions from both well-mixed GHG and SLCFs, resulting in a roughly 5 millikelvin global temperature reduction by 2040. Transitions to LPG and/or electricity also reduce annual emissions of PM2.5 by over 6 Mt (99%) by 2040, which would substantially lower health risks from household air pollution. Full transitions to LPG or grid electricity in LMICs improve climate impacts over BAU trajectories.
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