We also included the sustainable share of current use of biomass for tradi­tional uses in the category ‘Complementary fellings’. This biomass is cur­rently primarily used for domestic heat production. We worked upon the assumption that the majority of this use is woody biomass, though other sources will contribute.

The demand side scenario, to which this work is related [1], postulates that any traditional use of biomass that is considered unsustainable today will be gradually phased out and replaced with more sustainable approach­es, such as solar thermal heating.

No literature data was available on the sustainable share of current traditional biomass use. Therefore, as the scenario gradually phases out traditional biomass use, we have estimated that 30% of the phased out biomass can be harvested sustainably. This amounts to approximately 11 EJ of worldwide potential for this category.