Biodiversity, the Human Microbiome and Mental Health: Moving toward a New Clinical Ecology for the 21st Century?

Figure 3

Grey space is defined as areas with disproportionately higher industrial and commercial activity, major transportation routes, bars, liquor stores, convenience stores, fast-food outlets, and tobacco vendors. Noise stress, excess light at night, and presence of marketing drivers, billboards, sidewalk signage, and targeted screen media delivery, push a dysbiotic drift. Higher levels of grey space and less equitable access to green space (biodiversity) are an often-overlapping burden in disadvantaged populations (image: Susan Prescott).