Berkeley Air is coordinating the air quality and stove usage monitoring effort for the study. The randomized controlled trial is assessing the health effects of LPG stove interventions in 3,200 households in Rwanda, Guatemala, India, and Peru. Overall, the study goal is to provide evidence regarding potential health benefits of reduced HAP exposure, and evidence, including costs and implementation strategies, to inform national and global policies on scalable LPG stove intervention. Following intervention, study methodology includes extensive exposure measurements and biomarker collection and analysis on a long-term cohort of pregnant women, their infants, and older women sharing their households.