G Is Bio Energy an Option for Greening the Gas Market? OP_G_1_Shojiro Osumi.pdf OP_G_1_Shojiro Osumi_Paper.pdf OP_G_2_Jorg Gigler.pdf OP_G_2_Jorg Gigler_Paper.pdf OP_G_3_Stephan_Ramesohl.pdf OP_G_4_Olivier Bordelanne.pdf