List of concepts for natural areas, landscape, ecosystems

• resources management
• resource use
• retarding basin
• revegetation
• riparian zone
• river
• river basin
• river basin development
• river basin management
• river bed
• river channelling
• river management
• riverside vegetation
• rock
• rural area
• rural environment
• rural habitat
• salina
• salt marsh
• salt meadow
• sand dune
• sand dune fixation
• sand flat
• sand pit
• sea bed
• sea grass bed
• seashore
• secondary biotope
• sedimentary basin
• semi-arid land ecosystem
• sensitive area
• sensitive ecosystem
• sensitive environment
• sensitive natural area
• shelter
• shrub
• site protection
• site rehabilitation
• ski run
• skyline destruction