In this paper the economic

Energy profile in Spanish rural areas strongly depends on fossil fuels consumption, with the consequent dependence on fossil oil markets and generation of harmful emissions. Sustainability forestry practices may contribute in reducing this dependency while promoting the use of local resources and rural areas development, therefore generating wealth and jobs [16]. Sustainability includes social, environmental and economic aspects.
Wood fuel is an interesting renewable Celastrol resource which may be obtained mainly from cutting and clearing activities, logging residues, recycled wood or industrial by-products. It is important to highlight that the use of cost-efficient forest fuels allows mitigating greenhouse gas emissions [17]. According to Ref. [18] the technical limit of forestry and agriculture residues in Spain is about 82 TWh/y, equivalent to 4.95% of the primary energy consumed in Spain during 2008.
As pointed out by Girardin et al. [19], forest resources should be used in such a way that long-term ecosystem functionality is preserved. Therefore, allowed management interventions should guarantee forests structures similar to those found in natural ecosystems [19].