I wonder if small stove technology is appropriate in the Cambodian rural setting? I've been advised that fossil fuel distribution for cooking is not entrenched and that there is a charcoal industry for cooking.
Would the introduction of biochar producing stoves, such as those promoted by Worldstove,
http://worldstove.com/products/luciastove-for-developing-nations/ be a catalyst for change? If freely available waste biomass could replace charcoal as the fuel of choice, and at the same time biochar is identified as improving crop yields & reducing local fertilizer costs / inputs, then a virtuous circle can develop.