Benefit-cost ratios of intervention to control or prevent air pollution from household SFU will depend on what benefits and costs are included in the analysis and how non-market benefits and costs are valued. Health effects of air pollution are often a major concern and motivation for intervention. Which health effects to include and how they are valued are therefore an important consideration in an economic analysis. Large scale household stove programs have also been motivated by natural resource considerations, for instance in China in the 1980s. The aim of that program was primarily improved energy efficiency but.