Environment Database
The environment database and a glossary about facts, terms and descriptions

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  4. Glossary O

Glossary O

The Environmental Glossary. Letter O +++ Popular Articles: 'Ozone hole', 'Overgrazing', 'Oxygen'

Outfall

An outfall is the pipe through which industrial facilities and wastewater treatment plants Discharge their Effluent (wastewater) into a waterbody.

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Outlier

An Outlier is an extreme observation that is shown to have a low probability of belonging to a specified data population; any item rejected by the sampler, analyst, or data reviewer, usually accompanied by an attendant explanation.

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Output pollution control

Output Pollution control see Pollution cleanup.

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Over the Counter Drugs

Over the Counter Drugs are Medications available without prescription.

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Over-crowding

Deutsch: Überbevölkerung / Español: Superpoblación / Português: Superlotação / Français: Surpopulation / Italiano: Sovraffollamento

Over-crowding in the environmental context refers to a situation where the population Density in a specific area exceeds the Capacity of the environment to sustain it. This condition can apply to both Human populations in urban settings and Animal populations in natural habitats. Over-crowding leads to a range of environmental, social, and ecological issues, including resource depletion, habitat degradation, increased pollution, and reduced Quality of Life.

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Over-development

An over-development is expansion or development of land to the point of damage.

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Over-fishing

An over-fishing is fishing beyond the capacity of a population to replace itself through natural reproduction.

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Over-grazing

An over-grazing is grazing livestock to the point of damage to the land.

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Overall Confidence:

An Overall Confidence: is EPA has assigned an overall confidence level for each pollutant based on consideration of the combined uncertainties from emissions estimation, ambient concentration modeling, and exposure modeling.

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Overexploitation

Deutsch: Übernutzung / Español: Sobreexplotación / Português: Sobre-exploração / Français: Surexploitation / Italiano: Sovrasfruttamento

Overexploitation refers to the excessive use of natural resources at a rate that exceeds their natural replenishment, leading to the depletion or degradation of ecosystems. This environmental problem affects biodiversity, forests, fisheries, water resources, and other key components of the planet’s natural systems. Overexploitation often results from human activities such as unsustainable Logging, overfishing, and excessive water use, which can disrupt ecosystems and threaten the survival of species.

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