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Faut-il craindre des guerres de l’eau? Y aura-t-il assez d’or bleu en 2050 pour nourrir une planète de 9 milliards d’habitants? A quand l‘accès à l’eau potable dans les pays en développement? Éléments de réponse du géologue Ghislain de Marsily, auteur de "L'eau, un trésor en partage".

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