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| Terms for subject Environment (5949 entries) |
| Caspian Sea (No definition needed) | Kaspiar itsasoa | |
| catalysis (A phenomenon in which a relatively small amount of substance augments the rate of a chemical reaction without itself being consumed) | katalisi | |
| catalyst (A substance whose presence alters the rate at which a chemical reaction proceeds, but whose own composition remains unchanged by the reaction. Catalysts are usually employed to accelerate reactions(positive catalyst), but retarding (negative) catalysts are also used) | katalizatzaile | |
| catalytic converter (Catalytic converters are designed to clean up the exhaust fumes from petrol-driven vehicles, which are otherwise the major threat to air quality standards in congested urban streets and on motorways. Converters remove carbon monoxide, the unburned hydrocarbons and the oxides of nitrogen. These compounds are damaging to human health and the environment in a variety of ways. The converter is attached to the vehicle' s exhaust near the engine. Exhaust gases pass through the cellular ceramic substrate, a honeycomb-like filter. While compact, the intricate honeycomb structure provides a surface area of 23.000 square metres. This is coated with a thin layer of platinum, palladium and rhodium metals, which act as catalysts that simulate a reaction to changes in the chemical composition of the gases. Platinum and palladium convert hydrocarbons and carbon monoxide into carbon dioxide and water vapour. Rhodium changes nitrogen oxides and hydrocarbons into nitrogen and water, which are harmless) | bihurgailu katalitiko | |
| catastrophe (A sudden, widespread disaster or calamity that greatly exceeds the resources of an area or region) | katastrofe | |
| catastrophe (A sudden, widespread disaster or calamity that greatly exceeds the resources of an area or region) | hondamendi | |
| catch yield (The yield obtained from a given fishery; fishery catches should be strictly controlled so that the fish population can have a sufficient breeding mass and thus give a sustained yield for future generations) | arrantzu | |
| catchment (A structure in which water is collected) | ur-bilketa | |
| catchment area (1. An area from which surface runoff is carried away by a single drainage system. 2. The area of land bounded by watersheds draining into a river, basin or reservoir) | arro | |
| category of endangered species (Those of the planet's flora and fauna which are threatened with extinction. Hunting and poaching to fuel the trade in ivory, horn, skins, fur and feathers have long been a threat to already endangered species. Pollution, agricultural expansion, loss of wetlands, deforestation and other erosion of habitats have been added to the hazards. Human activity was responsible for most of the animals and plants known to have been lost in the past two centuries) | galzoriko espeziearen kategoria | |
| cation (A positively charged atom or group of atoms, or a radical which moves to the negative pole (cathode) during electrolysis) | katioi | |
| cattle (Domesticated bovine animals, including cows, steers and bulls, raised and bred on a ranch or farm) | behi-azienda | |
| cause for concern principle (Principle connected with the precautionary principle: it means that, if there are strong reasons for expecting serious or irreversible damage to the environment following a given project, lack of full scientific certainty should not be used as a reason for postponing cost-effective measures to prevent environmental degradation. Critics of this approach are concerned about large commitments of resources to deal with vaguely defined problems) | kezka-printzipiorako arrazoi | |
| cause-effect relation (The relating of causes to the effects that they produce) | kausa-efektu erlazio | |
| cave (1. An underground hollow with access from the ground surface or from the sea, often found in limestone areas and on rocky coastlines. 2. A natural cavity, chamber or recess which leads beneath the surface of the earth, generally in a horizontal or obliquely inclined direction. It may be in the form of a passage or a gallery, its shape depending in part on the joint pattern or structure of the rock and partly on the type of process involved in its excavation. Thus, caves worn by subterranean rivers may be different in character from, and of considerably greater extent than, a sea-cave eroded by marine waves. 3. A natural underground open space, generally with a connection to the surface and large enough for a person to enter. The most common type of cave is formed in a limestone by dissolution) | kobazulo | |
| CD-ROM (A compact disc on which a large amount of digitalised read-only data can be stored, compact disc read-only-memory) | CD-ROM | |
| CD-ROM search service (The provision of special aid by library staff trained to query bibliographic or other information contained on an electronic storage medium, usually to meet the research needs of the library's clients) | CD-ROMeko bilaketa-zerbitzu | |
| cell (The microscopic functional and structural unit of all living organisms, consisting of a nucleus, cytoplasm, and a limiting membrane; biology) | zelula | |
| cell (energy, The basic building block of a battery. It is an electrochemical device consisting of an anode and a cathode in a common electrolyte kept apart with a separator. This assembly may be used in its own container as a single cell battery or be combined and interconnected with other cells in a container to form a multicelled battery) | pila elektrokimiko | |
| cellulose (The main polysaccharide in living plants, forming the skeletal structure of the plant cell wall; a polymer of beta-D-glucose linked together with the elimination of water to form chains of 2000-4000 units) | zelulosa |