Vandets kredsløb og vandbalanceligningen
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13:42
Kulstoffets kredsløb
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8:57
Porøsitet og permeabilitet
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2:31
Grundvandet i Danmark
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12:38
Olie og gas dannelse
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39:51
Die wichtigsten Aussagen der Kanzlerkandidaten | Das ZDF-Wahlforum "Klartext"
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27:15
The Most Misunderstood Concept in Physics
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4:20
Paxi - Vandets kredsløb
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2:03