Living in the Safe and Just Space for Humanity is the double outcome needed to reach the Sustainable Development Goals (SDGs) adopted by the UN in 2015. We need both to stay within the planetary boundaries identified by a group of scientist in 2009 and reach the social goals of reducing poverty and hunger, safeguarding health, protecting equality, providing education etc of the 2030 Agenda. Goal 12 Responsible production and consumption has a central position among the SDGs. For cities goal 12 of resource management is dominated by energy, waste and water. Here we see much collaboration between cities and universities. While cities implement, universities and researchers develop and research the technologies needed. This may be of general character, but there are many cases where a close collaboration between a city and its university has developed. Cases to be examined include: Energy production and efficient use especially for heating; Waste management and biogas production from organic food waste to be used for the city buses; Mobility management and biking with a focus on improved conditions for biking to reduce car driving and air pollution while supporting health and wellbeing; Urban planning, densification and greening, analyzing the conflict between densification and urban green as well as how building multifamily housing in wood reduces climate impact and makes more sustainable housing.