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| Terms for subject Environment (5582 entries) |
| heavy metal (A metal whose specific gravity is approximately 5.0 or higher) | metalls pesants | |
| heavy metal load (The amount of stress put on an ecosystem by heavy metal pollution released into it) | càrrega de metall pesant | |
| hedge (A line of closely planted bushes or shrubs, marking the boundaries of a field. The type of hedge varies between parts of the country, and its age can be dated from the number of species of tree and shrub present. Over the last thirty years hedge-row removal has had a marked visual effect on lowland agricultural landscapes. From the farmer's point of view, in areas of predominant arable or intensively managed grazing, there is little or no economic justification for retaining hedges) | bardissa | |
| herbicide (A chemical that controls or destroys undesirable plants) | herbicida | |
| herbivore (An animal that feeds on grass and other plants) | herbívor | |
| heterocyclic compound (Compound in which the ring structure is a combination of more than one kind of atom) | compost heterocíclic | |
| high mountain | alta muntanya | |
| high protein food | aliment alt en proteïnes | |
| high tide water (The level of water when the tide is at its highest level) | plenamar | |
| high voltage line (An electric line with a voltage on the order of thousands of volts) | línia d'alta tensió | |
| high-rise building (Any tall, multistoried structure or edifice that is equipped with elevators) | edifici de gran alçada | |
| high-speed railway (The term "high-speed traffic" encompasses all trains running at speeds over 200 km/h but also trains running at 200 km/h if the terrain, population density or economic reasons do not justify higher speeds) | ferrocarril d'alta velocitat | |
| high-speed train (Trains travelling at maximum speeds of 300kmh on special high-speed rail lines) | trens d'alta velocitat | |
| higher education (Study beyond secondary school at an institution that offers programs terminating in undergraduate and graduate degrees) | ensenyament superior | |
| highland ecosystem (The interacting systems of the biological communities and their non-living surroundings in regions of relatively high elevation, typically characterized by decreased air pressure and temperature, reduced oxygen availability and increased isolation) | ecosistema d'altiplà | |
| highway (A public road especially an important road that joins cities or towns together) | carretera | |
| hiking trail (A trail in the country along which one can walk, usually for pleasure or exercise) | sender | |
| hill (A natural elevation of the land surface, rising rather prominently above the surrounding land, usually of limited extent and having a well-defined outline, rounded rather than peaked or rugged, with no specific definition of absolute elevation) | turó, pujol | |
| historic centre (That part of a town or city in which the principal public and historic buildings are located) | centre històric | |
| historical evolution (The process by which small but cumulative changes in the learned, nonrandom, systematic behavior and knowledge of a people occur from generation to generation) | evolució històrica |