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1 Return to an original state, such as the natural capacity of an open system for self‐repair.

2 In conservation, the process by which the decline of an endangered or threatened species is arrested or reversed, and threats neutralized, so that its survival in the wild can be ensured.

3 In mineral processing, the amount of mineral that is separated and recovered in a mill, as a percentage of that calculated to be the original ore.

4 In waste management, the process of obtaining materials or energy resources from solid or liquid waste.

5 In disaster management, the coordinated process of supporting communities that have been affected by disaster in reconstruction of the physical infrastructure and restoration of emotional, social, economic, and physical well‐being.

Subjects: Environmental Science.

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