#conservation  the preservation and careful management of the environment and of natural resources
  supertype:  #saving__preservation  the activity of protecting something from loss or danger
  subtype:  #conservancy  the official conservation of trees and soil and rivers etc.
  subtype:  #soil_conservation  protection of soil against erosion or deterioration
  subtype:  #oil_conservation__oilconservation  the conservation of petroleum resources
  subtype:  #water_conservation__waterconservation  the conservation of water resources

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