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ID number:476977
 
Author:
Evaluation:
Published: 12.05.2007.
Language: Latvian
Level: Secondary school
Literature: n/a
References: Not used
Extract

Ūdens trūkumu rada ne tikai ūdens patēriņa pieaugums, bet to izraisa arī upju, ezeru, jūru un okeānu piesārņošana ar atkritumiem un notekūdeņiem. Galvenais ūdeņu piesārņojuma avots ir rūpniecības un komunālie notekūdeņi.
Ļoti daudzas vielas Pasaules okeānā nonāk no atmosfēras. Tie galvenokārt ir smagie metāli, dažādi pesticīdi. …

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