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Encyclopedia :: encyclopedia : Natural resource (Site not responding. Last check: 2007-10-31) |
 | | Renewable resources are generally living resources (fish, coffee, and forests, for example), which can restock (renew) themselves at approximately the rate at which they are extracted, if they are not overharvested. |
 | | Mineral resources are generally non-renewable and, once a site's non-renewable resource is exhausted, it is considered to be useless for future extraction, barring technological improvements that allow economic extraction from the tailings. |
 | | Both extraction of the basic resource and refining it into a purer, directly usable form, (e.g., metals, refined oils) are generally considered natural-resource activities, even though the latter may not necessarily occur near the former. |
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