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Comparison of aerial photos, maps and triangulation data reveal that in the last 40yr a part of the Thessaloniki coastal plain, a delta formed in the last 2500yr, subsided at a rate of up to 10cm/yr. As a consequence the sea invaded up to 2km inland; precious land in the suburbs of the city was lost, while a village and major industrial plants are in risk of flooding. Part of the land was reclaimed...
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