the austrian delegation at the g17 summit in hamburg #g17 #hamburg #sustainabledevelopmentgoals #sustainablebuilding #greenbuilding #greenbuildingcouncil #ögni #deutschegesellschaftfürnachhaltigesbauen #gbce #sgni #gbcfrance #greenbuildingcouncildenmark #rmengineers 
official „DGNB GOLD“ pre-certification handover of the new office building „ALPHAGON“ in the austrian embassy in budapest #dgnb #deutschegesellschaftfürnachhaltigesbauen #budapest #alphagon #rmengineers