Climate and location important. Local weather conditions can affect the success of technology, as they did in the case of the type I system. The sustainability of type I systems, which include a greenhouse, could be marginal in Shanxi Province where the annual average temperature is low and they can only function properly for about half the year. The province's harsh weather also means that the greenhouses deteriorate faster and need more intensive maintenance. Understanding the geography of farmers' lives is also important in designing projects such as this. The systems were constructed on the farms and were usually far from farmers' houses. This limits the benefits of using the biogas to cooking one or two meals a day when farmers are at work in their fields.
Efficient Utilization of Agricultural Wastes Project