SUSTAIN focuses on biobased engineering for a more sustainable, resilient and healthy society. Technology- and nature-based solutions target local and global environmental challenges such as climate change, biodiversity loss, disturbed nitrogen and phosphorus cycles, air quality and livability. We develop microbial cleantech based on bacterial concepts for water treatment, nutrient management, food production and climate change mitigation. Furthermore, we explore the dynamics of carbon cycling in terrestrial ecosystems, including nature-based solutions for CO2 removal in agricultural and other environments. Urban green is also an important focal area, with strong links to the urban ecosystem, health and liveability. Within all themes, we perform environmental systems analysis, such as life cycle assessment and material or substance flow analysis, e.g. with a focus on city-hinterland relationships. Hereby, the social dimension can also be included.