Clean Cookstove Adoption in Rural India
University of Chicago / Harvard / IPA · India (Orissa state) · 2016
Summary
The clean cookstove experiment produced a sobering null result despite high initial enthusiasm. Although households adopted the stoves when offered at subsidized prices, usage fell sharply over 4 years as stoves required maintenance and households found traditional cooking methods preferable for certain dishes. Critically, no improvement in health outcomes was detected — suggesting that either usage rates need to be much higher to see health effects, or that even 50% reduced emissions are insufficient given household exposure levels. The finding substantially revised the development community's approach to clean energy interventions.
Research question
"Do improved cookstoves reduce indoor air pollution and health burdens for rural households?"
Methodology
Intervention
Randomly offered improved biomass cookstoves (Envirofit) at subsidized prices; cookstoves reduce particulate emissions by 50–80% compared to traditional open fires
Assignment
Randomized controlled trial (village-level randomization)
Sample size
2,651 households across 44 villages
Primary outcome
Stove usage; indoor PM2.5 concentrations; respiratory outcomes; fuel use
Effect estimate
Stove adoption high initially but usage fell to 50% after 1 year and 25% after 4 years; no significant improvement in health outcomes detected
Decision
WHO and development funders revised clean cookstove program design emphasis; moved toward behavior change and maintenance support
Result
Null
Stove adoption high initially but usage fell to 50% after 1 year and 25% after 4 years; no significant improvement in health outcomes detected
Evidence strength
Strong
Randomized trial, replicated across multiple sites or studies.
Replication status
Replicated
Institution
University of Chicago / Harvard / IPA
Location
India (Orissa state)
Year
2016
Policy area
Public Health
Mechanism
Information