The primary goal of this project was to evaluate the effects of four behavior change interventions in Kenya, Bangladesh, and Nigeria on the purchase of modern cookstoves and fuels as well as determinants of behaviors, such as knowledge, attitudes, beliefs, and intentions. The interventions used behavior change communications (BCC) that aimed to accelerate clean cooking markets by increasing awareness and adoption of cleaner and/or more efficient cooking solutions that are designed to reduce the health and environmental impacts of solid fuel and kerosene use. A secondary aim of the evaluation was to model, where possible, the potential impact of scaled-up BCC activities on the Alliance’s key mission areas of health, environment, livelihood, and gender. For this project we conducted several 800-1000 HH surveys, hundreds of in depth interviews, several focus groups, and directly measured stove use in hundreds of homes.