Glossary C

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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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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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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Deutsch: Klassifizierung / Español: Clasificación / Português: Classificação / Français: Classification / Italiano: Classificazione /

A classification is the process of assigning a resource unit to one of a set of classes defined by values of specified attributes.

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Deutsch: Tonminerale / Español: Arcilla / Português: Argila / Français: Argile / Italiano: Argilla
Clay is a general term including many combinations of one or more clay minerals with traces of metal oxides and organic matter. Geologic clay deposits are mostly composed of phyllosilicate minerals containing variable amounts of water trapped in the mineral structure.

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A Clay Soil is Soil material containing more than 40 percent clay, less than 45 percent sand, and less than 40 percent silt

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A Clayoquot Sound is one of the last remaining unlogged watersheds on the west coast of Canada's Vancouver Island.

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Deutsch: Clean Air Act / Español: Ley del Aire Limpio / Português: Lei do Ar Puro / Français: Loi sur l'Air Propre / Italiano: Legge sull'Aria Pulita /

The Clean Air Act gives EPA authority to set standards for air quality and to control the Release of airborne chemicals from industries, power plants, and cars.

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A Clean Coal Technology is any technology not in widespread use prior to the Clean Air Act Amendments of 1990. This act will achieve significant reductions in pollutants associated with the burning of coal.

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A clean fuel is fuels which have lower Emissions than conventional gasoline and diesel. Refers to Alternative Fuels as Well as to reformulated gasoline and diesel.

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