manufacturing activity(Activities connected with the processing of raw material into a finished product, especially by means of a large-scale industrial operation)
economic activity(Any effort, work, function or sphere of action pertaining to the production of goods, services or any other resource with exchange value)
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)