The earth(ground) symbolizes the life, it regenerates thanks to the alternation "production / recycling" of organic matters. Earth worms are an essential link of this cycle. They are animals the most spread on the planet. Their action(share) in the reconstruction and the aeration of grounds is essential. They are also a gigantic reservoir of food for numerous animals. The mechanization of the work of the earth(ground) and the custom(usage) of massive fertilizer affect very seriously the population of earthworms, with negative effects on the environment. Consequence, the desert progresses! Prix du jury : Les Frontières du Court / Science .Frontière Marseille 2007 Prix du jury : Festival Nature et Environnement. Dompierre / Besvre 2007 Prix Artistique du jury : Festival FRAPNA .Grenoble 2007 Prix du documentaire Festival du film court , Santiago de Compostela. Espagne, oct 2007 Prix de l’environnement Festival Agrifilm .Tunis.Tunisie, 2007 Prix du documentaire court. Festival du film de l’oiseau et de la nature Abeville 2008 Golden award Cambofilm festival Cambodia