The Lancet Global Health, Volume 9, March 2021

This Viewpoint supports SDGs 3, 6, and 7 by discussing some of the reasons why many of the innovations and technologies for WASH (water, sanitation, and hygiene) and household air pollution developed in recent decades have not led to the expected improvements in health outcomes, and why many of these interventions have either been inconsistently adopted by low-income households, or not adopted at all.
Background: Approximately 2·8 billion people are exposed to household air pollution from cooking with polluting fuels. Few monitoring studies have systematically measured health-damaging air pollutant (ie, fine particulate matter [PM2·5] and black carbon) concentrations from a wide range of cooking fuels across diverse populations. This multinational study aimed to assess the magnitude of kitchen concentrations and personal exposures to PM2·5 and black carbon in rural communities with a wide range of cooking environments.