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Table 2 Natural environment classification and typology definitions and subsets for analysis of specific health-related mechanisms

From: Characterisation of the natural environment: quantitative indicators across Europe

Level 1 Level 1.1 Level 2 Type(s) of space included Mechanism group (and size criteria)
Stress reduction/restoration (all types) Physical activity Social contact
Green Urban green space Parks Urban parks Y (≥0.25 ha) Y (≥0.5 ha) Y (≥0.25 ha)
   Semi-natural/natural Biodiversity areas, conservation areas, nature reserves, protected areas, heritage sites? Y (≥0.25 ha) Y (≥0.5 ha) Y (≥0.25 ha)
   Formal recreation Playgrounds and sports fields (not within parks) Y (≥0.25 ha) Y (≥0.25 ha) Y (≥0.25 ha)
   Civic space Squares, gardens, Y (any size) Y (≥0.5 ha) Y (any size)
   Functional/amenity Allotment, cemetery, amenity spaces, Institutional (school, hospital grounds etc.) Y (≥0.25 ha) Y (≥0.5 ha) Y (≥0.25 ha)
   Natural/green corridor Traffic free/natural: pathways, trails and cycle paths Y (≥0.25 ha) Y (≥0.25 ha) Y (≥0.25 ha)
   Derelict/vacant   N N N
   Residential gardens Private gardens N N N
   Other natural features Street greenery Y (≥0.25 ha) N N
  Woodland/forests Woodland/forests Woodland/forests Y (≥0.25 ha) Y (≥0.5 ha) Y (≥0.25 ha)
  Rural and agricultural land Rural and agricultural land Rural and agricultural land Y (≥0.25 ha) Y (≥0.5 ha) Y (≥0.25 ha)
  Country parks Country parks Country parks Y (≥0.25 ha) Y (≥0.5 ha) Y (≥0.25 ha)
Water Freshwater (inland water) Lakes/reservoirs/ponds (standing water bodies) Y (≥0.25 ha) Y (≥0.5 ha) Y (≥0.25 ha)
Rivers, streams, canals (linear water features) Y (≥0.25 ha) Y (≥0.25 ha) Y (≥0.25 ha)
Marine/coastal Including beeches (type of coastline) Y (≥0.25 ha) Y (≥0.25 ha) Y (≥0.25 ha)