This paper explores the geography of “green innovation hubs” and the relationship between green patents and local labour markets. The analysis considers the spatial distribution and evolution of patenting activity for green inventions and identifies green innovation hubs, i.e., regions demonstrating notable strength in green patenting. It also explores the relationship between the regional level of green patenting, economic activity, education, and local labour dynamics across OECD regions. Greater Copenhagen (a cross-border area including parts of Denmark and Southern Sweden) is used as an example to illustrate one region's green innovation ecosystem, assessing its progress, unique opportunities, and challenges.