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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: 'Oxygen', 'Overharvesting', 'Oceanography'

Outdoor Air Supply

An OUTDOOR AIR SUPPLY is air brought into a building from the outdoors (often through the ventilation system) that has not been previously circulated through the system. Also known as

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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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