Land health is the capacity for self-renewal in the soils, waters, plants, and animals that collectively comprise the land.
Aldo LeopoldIs it possible to preserve the element of Unknown Places in our national life? Is it practicable to do so, without undue loss in economic values? I say 'yes' to both questions. But we must act vigorously and quickly, before the remaining bits of wilderness have disappeared.
Aldo Leopold