For years, the story of cities has been a tale of attempting to carve out a place for humans outside of nature, a model that has exacerbated our global environmental challenges. Consequently, urban areas are perceived as drivers of environmental degradation, nature loss, climate change, and pollution. Yet, more recently, we have seen a recognition of the value of nature in cities, rural-urban linkages and reduction of urban sprawl. Local governments, hubs of knowledge and innovation, are trailblazing urban experiments that replace or complement grey infrastructure with green.