The concept of the natural environment by thể distinguished components: Complete Ecological units function as natural systems mà without massive human intervention Civilized, gồm all Vegetation, microorganisms, soil, rocks, atmosphere, and natural phenomena occur có có trong boundaries Universal natural resources and physical phenomena clear-cut boundaries Lack mà, như air, water, and climate, as well as energy, radiation, electric charge, and magnetism, not originating from human activity Civilized
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