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| English | Maltese |
| heavy goods vehicle traffic Traffic of large motor vehicles designed to carry heavy loads | traffiku ta' vetturi tqal tal-merkanzija |
| heavy metal A metal whose specific gravity is approximately 5.0 or higher | metall tqil |
| heavy metal load The amount of stress put on an ecosystem by heavy metal pollution released into it | tagħbija ta' metall tqil |
| Protocol to the 1979 Convention on Long-range Transboundary Air Pollution on Heavy Metals | Protokoll għall-Konvenzjoni tal-1979 dwar Tniġġis tal-Arja Transkonfini fuq Distanza Twila li Tikkonċerna l-Metalli Tqal |