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ID number:936202
 
Author:
Evaluation:
Published: 18.05.2023.
Language: Latvian
Level: Elementary school
Literature: n/a
References: Not used
Time period viewed: 2021 - 2025 years
Extract

Saldūdens ir ūdens, kur izšķīdušo sāļu saturs ir ļoti mazs. Saldūdens ir sastopams upēs, ezeros, ledājos un pazemes ūdeņos. Galvenais saldūdens avots ir atmosfērā esošo ūdens tvaiku nokrišņi — lietus un sniegs. Saldūdens ir nepieciešams it visā, lai cilvēce spētu eksistēt pilnvērtīgi.
Daļa saldūdens resursu ir izsmeļami atjaunojami dabas resursi, bet pazemes ūdeņi ir izsmeļami un atjaunojas ļoti lēni. Saldūdens trūkums ir nopietna problēma pasaulē. …

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