Berlin Energy Transition Dialogue (#betd21), which has become the leading international forum on the green energy transformation. Every year, high-level participants from politics, industry, science and civil society gather in Berlin for two days to discuss the shift to a sustainable energy system. In this diverse international conference, scientific expertise is paired with practical know-how, policymakers engage with civic groups, and young and experienced generations enrich each other by working hand in hand to accelerate the energy transition.