Johannes Kreißig, the head of the German Sustainable Building Council (DGNB), talks with Clean Energy Wire (CLEW) about the necessity of renovations in existing buildings and the role of sustainability certifications in accelerating progress.

Kreißig emphasises the importance of considering environmental, socio-cultural, and economic criteria for sustainable construction. He also discusses the significance of resilience against climate change and the need for global collaboration to achieve climate targets.