Sustainability impacts of increased forest biomass feedstock supply – a 1 comparative assessment of technological solutions 2 Diana Tuomasjukka 1i , Salvatore Martire 1ii , Marcus Lindner 1 , Dimitris 3 Athanassiadis 2 , Martin Kühmaier 3 , Jan Tumajer 4 , Martijn Vis 5 , Raffaele 4 Spinelli 6 , Matthias Dees 7 , Robert Prinz 8 , Johanna Routa 8 , Antti Asikainen 8 5 1 Diana Tuomasjukka 1 , Salvatore Martire 2 , Marcus Lindner, European Forest Institute (EFI), 6 Yliopistokatu 6, 80100 Joensuu, Finland; +358-50-7734320; diana.tuomasjukka@efi.int. 7 marcus.lindner@efi.int 8 2 Dimitris Athanasiadis, Swedish University of Agricultural Sciences (SLU), 901 83 Umeå, 9 Sweden; +46-90-7868304; dimitris.athanassiadis@slu.se 10 3 Martin Kühmaier, University of Natural Resources and Life Sciences (BOKU), Peter-Jordan- 11 Straße 82, 1190 Wien, Austria; +43-1-47654-91518; martin.kuehmaier@boku.ac.at 12 4 Jan Tumajer, Institute of Forest Ecosystem Research (IFER), Czech Republic, +420-2-4195 13 0607; jan.tumajer@ifer.cz 14 5 Martijn Vis, Biomass Technology Group (BTG), Postbus 835, 7500 AV Enschede, 15 Netherlands; +31-53-4861186; vis@btgworld.com 16 6 Raffaele Spinelli, National Research Council of Italy (IVALSA), Via Madonna del Piano 10, 17 50019 Sesto Fiorentino, Italy; +39-55-522564; spinelli@ivalsa.cnr.it. 18 7 Matthias Dees, FELIS, Albert-Ludwigs-Universität Freiburg, Tennenbacherstr. 4, 79106 19 Freiburg; Germany; +49-761-203-3697; matthias.dees@felis.uni-freiburg.de 20 8 Robert Prinz, Johanna Routa, Antti Asikainen, Natural Resources Institute Finland (Luke), 21 Yliopistokatu 6, 80100 Joensuu, Finland; robert.prinz@luke.fi, johanna.routa@luke.fi; 22 antti.asikainen@luke.fi 23 1 corresponding author 2 Independent researcher: salvo.martire@gmail.com