“…Whereas the aforementioned risk and protective factors are relatively well understood, how the built, natural, and social environments together affect mental disorders remains less clear ( Tost et al, 2015 , Stickley et al, 2017 , Adli et al, 2017 , Heinz et al, 2013 , Peen et al, 2010 , Prüss-Üstün and Corvalán, 2006 , Nieuwenhuijsen, 2016 ). There is increasing evidence that the built environment (e.g., urban morphology, land use, and street layout) might be a determinant of mental health ( Rao et al, 2007 , Sarkar and Webster, 2017 ). Although the existing knowledge is inconclusive, and the individual environments were frequently studied in isolation ( Mair et al, 2008 , Weich et al, 2002 , Evans, 2003 , Saarloos et al, 2011 , James et al, 2017 ), it seems that, for example, higher urban densities increase social interactions that may decrease the risk of psychotic disorders ( Kawachi and Berkman, 2001 ).…”