| Terms for subject Environment (7301 entries) |
| ultrafiltration (Separation of colloidal or very fine solid materials by filtration through microporous or semipermeable mediums) | ultrafiltrazzjoni | |
| ultrasound (Sound waves having a frequency above about 20,000 hertz) | ultrasound | |
| ultraviolet radiation (The part of the electromagnetic spectrum with wavelengths shorter than light but longer than x-rays; in the range of 4-400 nm) | radjazzjoni ultravjola | |
| UN Conference on Environment and Development | Summit dwar id-Dinja | |
| UNCED | UNCED | |
| uncontrolled dump (Place where waste is left on the ground and not buried in a hole) | miżbla mhux ikkontrollata | |
| underground biomass | bijomassa ta' taħt l-art | |
| underground disposal (The discharge, dumping or emission of wastes below the surface of the soil) | rimi ta' skart taħt l-art | |
| underground dump (Any subterranean or below-ground site in which solid, or other, waste is deposited without environmental controls) | miżbla taħt l-art | |
| underground quarry (Quarry located below the surface of the earth) | barriera taħt l-art | |
| underground railway (An electric passenger railway operated in underground tunnels) | ferrovija metropolitana | |
| underground storage (Storage located underground designed to hold gasoline or other petroleum products or chemical solutions) | ħżin taħt l-art | |
| underground storage | ħażna taħt l-art | |
| underground train (A train for transportation of people, mostly beneath the surface of the ground, in order to lessen the traffic) | ferrovija taħt l-art / metropolitana | |
| underprivileged people (A segment of the population that does not have access to the rights or benefits granted to the rest of society, often because of low economic or social status) | persuni żvantaġġati | |
| undertaking business (Any commercial activity, position or site associated with the preparation of the dead for burial and the management and arrangement of funerals) | impriża tal-funerali | |
| underwater outlet (Point of water disposal located below the sea surface) | punt fejn id-drenaġġ jiskula f'qiegħ il-baħar | |
| unemployment (The condition of being without remunerative employment) | qgħad | |
| UNFCCC independent transaction log | reġistru indipendenti tat-tranżazzjonijiet tal-UNFCCC | |
| ungulate (Hoofed mammals, including the Artiodactyla and Perissodactyla) | ungulati |