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| Terms for subject Environment (23140 entries) |
| catalytic combustor | apparecchiatura a combustione catalitica | |
| catalytic conversion | conversione catalitica | |
| 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) | marmitta catalitico | |
| catalytic incinerator | inceneritore catalitico | |
| catalytic purification of industrial effluents | purificazione catalitica di effluenti industriali | |
| catastrophe (A sudden, widespread disaster or calamity that greatly exceeds the resources of an area or region) | catastrofe | |
| catch yield | resa del pescato | |
| 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) | resa del pescato | |
| catcher | ricuperatore | |
| catching marine mammals | cattura di mammiferi marini | |
| catchment (A structure in which water is collected) | captazione | |
| catchment | captazione (struttura) | |
| catchment area | area di raccolta delle acque | |
| catchment area | bacino imbrifero | |
| 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) | area di raccolta delle acque | |
| catchpit | pozzo nero | |
| 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 delle specie minacciate | |
| catface | cicatrice sporgente | |
| cathodic electrolytic reduction | riduzione elettrolitica catodica | |
| cation (A positively charged atom or group of atoms, or a radical which moves to the negative pole (cathode) during electrolysis) | catione |