| Value | Category |
|---|---|
| 1 | Firewood |
| 2 | Charcoal |
| 3 | Coal/lignite |
| 4 | Animal waste/Dung |
| 5 | Crop residue/Plant biomass |
| 6 | Sawdust |
| 7 | Coal briquette |
| 8 | Biomass briquette |
| 9 | Processed biomass (pellets)/woodchips |
| 10 | Biogas |
| 11 | Ethanol |
| 12 | Garbage/ plastic |
| 555 | Other, specify |
| Sysmiss |