ligniinist, tselluloosist ja hemitselluloosist koosnev materjal, mille allikaks on mets, puittaimsed energiakultuurid ning metsatööstuse jäägid ja jäätmed, material composed of lignin, cellulose and hemicellulose, such as biomass sourced from forests, woody energy crops and forest-based industries' residues and wastes