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The Inteational Workshop on "Geoenvironmental problems and cross-border cooperation in Central America" was organized in Managua, Nicaragua, 5-8 December, 2005 by the Working Group Inteational Borders-Geoenvironmental Conces (IBC), under the IUGS Commission on Geosciences for Environmental Management (GEM) and in the framework of the IUGS funded project "Application of geosciences for sustainable development of cross-border areas(GEOCrossBorder)".