Table 2 Key elements of the study research question

Human populations in OECD countries

Adoption or implementation of NBS to address a specific challenge related to cost-efficacy of NBS, governance in planning, environmental justice, and the acoustic environment (cityscapes, seascapes and soundscapes)

With/without NBS actions, before/after,

Positive or negative effect on domains of human well-being defined by McKinnon et al. [15]