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

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Glossary C

The Environmental Glossary. Letter C +++ Popular Articles: 'Community', 'Contamination', 'Change'

Citation

Deutsch: Zitat / Español: Cita / Português: Citação / Français: Citation / Italiano: Citazione

Citation in the environmental context refers to the practice of referencing scientific studies, reports, or authoritative sources to support claims, findings, or recommendations in environmental research, Policy-making, and advocacy. Citations are essential for ensuring credibility, transparency, and accountability in addressing environmental issues.

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City

Deutsch: Stadt / Español: Ciudad / Português: Cidade / Français: Ville / Italiano: Città

City in the environmental context refers to an urban Area characterised by high population Density, infrastructure, and economic activity, which significantly impacts and interacts with natural ecosystems. Cities are both sources of environmental challenges, such as pollution and resource consumption, and hubs for sustainable innovation and environmental management.

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Clam

Deutsch: Muschel / Español: Almeja / Português: Amêijoa / Français: Palourde / Italiano: Vongola

Clam in the environmental context refers to a type of bivalve mollusc found in Freshwater and marine environments. Clams play important ecological roles, contributing to water filtration, serving as a Food source for various Wildlife, and being indicators of environmental Health due to their Sensitivity to pollution and habitat changes.

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Clarification

A Clarification is Clearing action that occurs during wastewater treatment when solids settle out.

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Clarifier

A Clarifier is a tank in which solids settle to the bottom and are subsequently removed as sludge.

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Clarity

A Clarity is the clearness of the water in the stream.

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Class 1 Railroad

A Class 1 Railroad is a line haul freight railroad of US ownership with operating revenue in excess of $272.0 million. There are seven (7) Class 1 Railroads in the United States. Two

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Class I Area

A Class I Area is Under the Clean Air Act. a Class I Area is one in which visibility is protected more

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Class I Substance

A Class I Substance is One of several groups of chemicals with an ozone depletion potential of 0.2 or higher, including CFCS, Halons, Carbon Tetrachloride, and Methyl Chloroform (listed in the Clean Air Act), and HBFCs and Ethyl Bromide (added by EPA regulations).

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Class II Substance

A Class II Substance is a substance with an ozone Depletion potential of less than 0.2. All HCFCs are currently included in this classification. (See: Global warming potential.)

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