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Owner description: The Natural Reserve of Salse di Nirano, which has about 50.000 visitors per year, is located in a low hill territory (elevation from 140 m to 308 m a.s.l.) of the Modena Apennine margin about 30 km from Modena. The salse are emissions of cold mud due to the ascent to the surface of salty and muddy waters mixed with gaseous (methane) and, in minor part, fluid hydrocarbons (petroleum veils) along faults and fractures.