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Atkritumu ietekme uz vidi
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Atkritumu ietekme uz vidi
College/UniversityResearch Papers22 -
Naftas piesārņojuma ietekme uz jūru un tā novēršana
College/UniversityResearch Papers16 -
Transporta ietekme uz vidi
College/UniversityResearch Papers6
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