Session: The built environment and the construction sector have a significant impact on the environment. Buildings are responsible globally for around 30% of energy use and produce around 28% of global CO2 emissions; the construction sector produces around 1/3 of global waste, not to mention air, water, and noise pollution and destruction of natural habitats. At the same time, the built environment, in particular in cities where most of global population lives, are threatened by effects of climate change. These include weather-related disasters that damage water, energy, transport, buildings and telecommunications infrastructure.Thus, it is urgent that an increased focus in placed on both the decarbonization of the built environment (both new and existing) and on the improvement of climate adaptation capacities of cities, buildings and infrastructures.