 |
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z << >>
| Terms for subject Environment (5582 entries) |
| Caribbean Area (A geographical region bordered on the south by South America and Panama, and on the west by Central America, and consisting of the West Indian, and nearby, islands and the Caribbean Sea, a part of the western Atlantic Ocean) | àrea del Carib | |
| carnivore (An animal that eats meat) | carnívor | |
| carry-over effect (Effect caused by the successive passages of polluting substances through the different organisms of a food chain) | efecte de romanent | |
| cartography (The making of maps and charts for the purpose of visualizing spatial distributions over various areas of the earth) | cartografia | |
| cash crop (Crops that are grown for sale in the town markets or for export. They include coffee, cocoa, sugar, vegetables, peanuts and non-foods, like tobacco and cotton. Huge areas of countries in the developing world have been turned over to cash crops. Those countries with no mineral or oil resources depend on cash crops for foreign money, so that they can import materials do develop roads, for construction, or to buy Western consumer goods and, indeed, food. However, critics argue that cash crops are planted on land that would otherwise be used to grow food for the local community and say this is a cause of world famine. Cash crops, such as peanuts, can ruin the land if it is not left fallow after six years of harvests. Moreover, if the best agricultural land is used for cash crops, local farmers are forced to use marginal land to grow food for local consumption, and this has a further dramatic effect on the environment) | conreu comercial | |
| Caspian Sea (No definition needed) | Mar Càspia | |
| catalysis (A phenomenon in which a relatively small amount of substance augments the rate of a chemical reaction without itself being consumed) | catàlisi | |
| 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) | catalitzador | |
| 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) | convertidor catalític | |
| catastrophe (A sudden, widespread disaster or calamity that greatly exceeds the resources of an area or region) | catàstrofe | |
| 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) | captura de pesca | |
| catchment (A structure in which water is collected) | captació | |
| 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) | conca | |
| 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) | categoria d'espècie amenaçada | |
| cation (A positively charged atom or group of atoms, or a radical which moves to the negative pole (cathode) during electrolysis) | catió | |
| cattle (Domesticated bovine animals, including cows, steers and bulls, raised and bred on a ranch or farm) | bestiar boví | |
| 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) | causa per al principi d'alerta | |
| cause-effect relation (The relating of causes to the effects that they produce) | relació causa-efecte | |
| 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) | cova | |
| 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 |