| Key ecosystem services | Main references |
| l Ecosystem services generally | [13] [22] [30] - [35] |
| l Attenuation of storm flow inferring reduced flood risk l Reduced/deferred stormwater system maintenance l Improved quality of stormwater | [9] [10] [11] [12] [36] - [44] |
| l Health and wellbeing (the biophilic value of GRs) l Passive recreation | See references listed for first function listed. There are limited data though there are a number of scholarly writings on the psycho-emotional benefits of biophilia, that is, access to or views of natural areas e.g. [45] |
| l Roof top temperature reduction contributing to UHI mitigation | See references above plus [29] [46] [47] and [48] |
| l Improved PV performance by combining with a green roof installation, leading to minor CO2 reduction at power plants | See references above plus [14] [48] - [53] |
| l Biodiversity conservation and protection including endangered and threatened flora and fauna | [32] [54] - [60] |
| l CO2 sequestration (though minor compared to street trees) | For example, [9] [43] and [61] |