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Sur l'image, on voit une sphère. La lumière représente le soleil. Les 'essuies glaces' font condenser la buée qui se transforme en gouttelettes.
2.1 les précipitations
2.2 la condensation
2.3 les infiltrations
2.4 l'évaporation
3 L'utilisation de l'eau
3.1 L'agriculture
Annotations:
La terre qui arrive au bord de la rivière.Trop de vaches et d'excréments réduisent la qualité de l'eau. La plantation de haies permet de protéger les bords de l'eau.
Les pesticides polluent l'eau.