This international standard determines the terminology and definitions for solid biofuels. According to the scope of ISO/TC 238 Solid biofuels this standard only includes raw and processed material originating from:
- forestry and arboriculture
- agriculture and horticulture
- aquaculture
Solid biofuels originating from different recycling processes of end-of-life-products are not within the scope but relevant terms are included for information. Areas covered by ISO/TC 28 SC 7 Liquid biofuels and ISO/TC 193 Natural gas are excluded.