“…The literature search was carried out in 5-6 October 2019 using nine frequently used databases, including PubMED (US National Library of Medicine, Maryland, U.S.), Scopus, ScienceDirect (Elsevier, Amsterdam, Netherlands), Web of Science (Clarivate Analytics, Philadelphia, U.S.), PsycINFO, PsyschARTICLES (American Psychologist Association, Washington D.C., U.S.), CINAHL (EBSCO Publishing, Massachusetts, U.S.), Cochrane Library (John Wiley & Sons, New Jersey, U.S.), and ProQuest (ProQuest LLC, Michigan, U.S.). Guidance on the search terms selected was obtained from recently published systematic reviews on green space (Houlden et al, 2018;Vanaken and Danckaerts, 2018) and prosocial behaviour (Oviedo, 2016;Silke et al, 2018;Vilar et al, 2019). The terms as presented in Table 1 were searched in the titles, abstracts, and/or keywords of the articles.…”