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L’économie circulaire : cercle vertueux ou cercle vicieux ?Le cas de l’utilisation de terres maraîchères pour aménager des espaces verts urbains

Abstract : As part of the measures taken to prevent infantile saturnism, the French Higher Council for Public Health (Haut Conseil de la Santé Publique – HCSP) set thresholds values in 2014 for lead concentrations in the soil. Considering the risks linked to the ingestion of particles of soil by children under the age of six, who tend to put their hands in their mouth, a vigilance threshold value of 100 mg of lead per kilogram of soil was set for green spaces. Following the publication of these new objectives, the City of Paris initiated a program intended to characterize the soil of its102 green spaces representing 500 ha. Analyses of metallic trace elements, of hydrocarbons and of agronomic parameters were carried out to assess soil quality. Related to the history of the green spaces, they provided the basis for several hypotheses on the origins of the topsoil that has been used in vegetable gardens over the past 200 years. Considering the efforts made to shift to a circular economy, that favour short circuits and local supplies, this paper critically examines the potential pollution of soils which move from the close suburbs to the green spaces of urban centres, where more and more vegetable gardens are developed. In this context, it is interesting to re-examine the principles and complex workings of the circular economy applied to the evolution of vegetable gardens from a historical and spatial point of view.
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Clément Gitton, Yoann Verger, Florence Brondeau, Ronald Charvet, François Nold, et al.. L’économie circulaire : cercle vertueux ou cercle vicieux ?Le cas de l’utilisation de terres maraîchères pour aménager des espaces verts urbains. Géocarrefour - Revue de géographie de Lyon, Association des amis de la revue de géographie de Lyon, 2018, 92 (92), ⟨10.4000/geocarrefour.11950⟩. ⟨hal-01972726⟩

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