| USA | EPA (2007) | Technologies and policies that bring you closer to the natural cycle of urban space. |
| Conservation Fund (2006) | A network of strategically planned and managed natural lands, landscapes and other open spaces that conserve ecological value functions and provide multiple benefits to residents. |
| UK | Natural England (2009) | Factors that provide ecosystem services through mutual relationships by expanding high-quality greenery and other environmental factors. |
| DEFRA (2010) | A planned network of green space and environmental elements using street trees, gardens, rooftops, greenery, village forests, parks, streams and streams, urban farms, cemeteries, road railroads, and forest areas. |
| Republic of Korea (2020) | Protected areas, open spaces, forests, wild habitats, parks, wetlands, streams and waterways, pitching facilities, rooftop gardens, urban agricultural spaces, green axes, greenways, and street trees, including natural, semi-natural, and artificial green spaces are integrated. Pursuing versatility as a major basis and system for determining the spatial structure and improving its functions with the concept of viewing. |