Home > Term: natural occurrence
natural occurrence
Presence of a substance in nature, as distinct from presence resulting from inputs from human activities.
Note: The contamination of the natural environment by some man-made compounds may be so widespread that it is practically impossible to get access to biota with a truly natural level; only ‘normal’ levels can be measured, those which are usually prevalent in places where there is no obvious local contamination.
- Jenis Kata: noun
- Industri / Domain: Biologi; Bahan-bahan kimia
- Kategori: Ilmu tentang racun
- Company: National Library of Medicine
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- Walter Lane
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