| environ. |
deep sea mining The most valuable of the marine mineral resources is petroleum. About 15% of the world's oil is produced offshore, and extraction capabilities are advancing. One of the largest environmental impacts of deep sea mining are discharged sediment plumes which disperse with ocean currents and thus may negatively influence the marine ecosystem. Coal deposits known as extensions of land deposits , are mined under the sea floor in Japan and England (最有价值的海洋矿物资源是石油。 世界上约有15%的石油产自外海，且提取能力不断进步。深海采矿对环境最大的影响之一是弃置沉积物所产生的烟尘随着洋流而扩散，因此可能对海洋生态产生负面影响。众所周知煤矿是陆上矿藏的延伸，已开采的有日本和英国海底的煤矿。) |
