Leipzig University, Germany, is starting a new research training group on the Economics of Connected Natural Commons: Atmosphere and Biodiversity (ECO-N), funded by the German Research Foundation (DFG). ECO-N combines interdisciplinary research on sustainably using and conserving natural commons such as biodiverse forests, fertile soils, regional climate, or clean urban air with a rigorous course programme providing disciplinary and interdisciplinary competencies. Approximately 30 early-career researchers and established researchers from economics, meteorology, and biology will collaborate within ECO-N. We seek to fill 14 funded doctoral researcher positions from September 2024 to August 2028.