| Subject | Catalan | English |
| environ. | alteració climàtica | climatic alteration The slow variation of climatic characteristics over time at a given place. This may be indicated by the geological record in the long term, by changes in the landforms in the intermediate term, and by vegetation changes in the short term |
| environ. | alteració de paisatge | landscape alteration Landscapes might change through time as a result of human activities or natural processes such as fires or natural disasters. Changes in landscape structure can be documented by using data from aerial photographs or satellite images, and new technologies, such as remote sensing and geographic information systems |
| environ. | alteració del son | sleep disturbance |
| environ. | alteració física | physical alteration Any change in a body or substance that does not involve an alteration in its chemical composition |
| environ. | alteració per soroll | noise disturbance Noise interferes with communication and interferes with thought processes. Noise interferes with sleep, it causes anger and frustration, and has been implicated as a contributor to various psychological and physiological problems. Noise detracts from the quality of life and the environment |
