2015.06.18-20  The Vienna Energy Forum (VEF) is a biennial, global and multi-stakeholder forum with a mandate of exploring 21st century developmental challenges from the perspective of sustainable energy and providing a platform for debate on practical solutions to these challenges. Given that the complex issues connected to sustainable energy need to be addressed in a holistic manner, the VEF brings together all sectors of society and participants from all over the world, thereby paving the way for tangible partnerships on the ground.