From Linear Fuel Switching to Multiple Cooking Strategies: A Critique and Alternative to the Energy Ladder Model

Promoting sustainable development requires evaluating the technical and policy options that will facilitate the adoption and use of energy efficient and less polluting cooking stoves and practices. The transition from traditional to modern fuels and devices has been explained by the “energy ladder” model that suggests that with increasing affluence, a progression is expected from traditional biomass fuels to more advanced and less polluting fuels. In this paper we evaluate the energy ladder model utilizing data from a four-year (1992–96) case study of a village in Mexico and from a large-scale survey from four states of Mexico. We show that an alternate “multiple fuel” model of stove and fuel management based on the observed pattern of household accumulation of energy options, rather than the simple progression depicted in the traditional energy ladder scenario, more accurately depicts cooking fuel use patterns in rural households. The “multiple fuel” model integrates four factors demonstrated to be essential in household decision making under conditions of resource scarcity or uncertainty: (a) economics of fuel and stove type and access conditions to fuels, (b) technical characteristics of cookstoves and cooking practices; (c) cultural preferences; and (d) health impacts. This model also allows better estimates of the expected fuelwood demand and indoor air pollution in rural households.