Sand, gravel and phosphate from the sea « World Ocean ReviewThe extraction of mineral resources from the sea is by no means a new activity. . How much marine sand and gravel is effectively taken worldwide is difficult to .. Some countries take a very critical view of the mining of sand and gravel.sand and gravel mining from sea,Sand Extraction: 1. Introduction - GreenFactsThis sand and gravel are mined world-wide and account for the largest volume of . Dredging and extraction of aggregates from the benthic (sea bottom) zone.
sand and gravel mining from sea