Wood fuels

Comprises following fuel classification categories:
- Firewood (stems and split firewood) (3111)
- Chips from roundwood (3112)
- Forest residue chips (3113)
- Bark (3121)
- Sawdust, cutter shavings etc. (3122)
- Wood residue chips (3123)
- Unspecified industrial wood residue (3128)
- Other industrial wood residue (3129)
- Black liquor and other concentrated liquors (3130)
- Other by-products from wood processing industry (3140)
- Recovered wood (3150)
- Wood pellets and briquettes (3160).