Table 1.

Glossary of Key Terms

Term	Definition	Reference(s)
Blue Space	All visible surface water in a space; including oceans, lakes, rivers, streams, ponds, and other such waterscapes.	(Völker & Kistemann, 2011)
Brown Space	Areas where the space is dominated by soil type, rocks, and green is less prominent such as arid regions including desert landscapes.	(Nazif-Munoz et al., 2020)
Gray Space	Areas dominated by concrete, buildings, and other impervious surfaces typically characteristic of human-constructed environments.	(Nazif-Munoz et al., 2020)
Green Exercise	Physical activity undertaken in both urban and nonurban natural environments.	(Pretty et al., 2005)
Green Space	Areas dominated by natural and/or planted vegetation such as grass, plants, or trees.	(Klompmaker et al., 2018; Taylor & Hochuli, 2017)
Natural Environments	Landscapes dominated by blue space, green space, and/or brown space that contain flora and fauna that are minimally influenced by humans.	(Johnson et al., 1997; McIsaac & Brün, 1999)
Nature-based Components	Often called parks, green spaces, natural areas, conservation areas, forests, water-access, greenways, and a variety of other terms. Typically, these spaces have been defined as areas with predominant vegetative and/or geological features that reflect natural processes (e.g., trees, prairies, grasses).	(Frumkin et al., 2017; Lachowycz & Jones, 2013; Layton, 2018; Taylor & Hochuli, 2017; World Health Organization, 2016)
Nature-based Interventions	Programs, activities or strategies that aim to engage people in nature–based experiences with the specific goal of achieving improved health and well-being	(Shanahan et al., 2019)
Nature-based Therapeutic Interventions	Use of a natural area, specifically designed or chosen, for a therapeutic intervention.	(Stigsdotter et al., 2011)