Man is a land animal, but he is also closely tied tothe sea. Throughout history the sea has served theneeds of man. The sea has provided man with foodand a convenient (便利的) way to travel to manyparts of the world. Today, nearly two—thirds of theworld's population live within 80 kilometers of thesea coast.
In the modern technological world, the sea offers many resources to help mankind survive(=continue to live). Resources on land are beginning to be used up. The sea, however, still canbe hoped to supply many of man's needs.
The list of riches of the sea yet to be developed by man's technology is impressive. Oil andgas explorations (探险) have been carried out for nearly 30 years. Valuable amounts of mineralsexist on the ocean floor ready to be mined (开采).
Fish farming promises to be a good way to produce large quantities of food. The culture of fishand shellfish (贝类动物) is an ancient skill practised in the past mainly by Oriental people.
Besides oil and gas, the sea may offer new sources of energy. Experts believe that the warmtemperature of the ocean can be used in a way similar to the steam in a steamship. Oceancurrents (水流) and waves offer possible use as a source of energy.
Technology is enabling man to explore (勘探) ever more deeply under the sea. Thedevelopment of strong, new materials has made this possible.
The technology to harvest the sea continues to improve. Experts believe that by the year 2000 the problems that prevent us from exploiting fully the food, minerals, and energy sources ofthe sea will be largely solved.
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