论文部分内容阅读
一、海洋中的丰富资源海洋覆盖地球表面约71%,平均深度约3,700米,在这13.7亿立方公里的水体里,蕴蓄着丰富的资源。首先是生物资源。海洋每年生产有机碳净重150—180亿吨,潜在的渔获量约2.4亿吨。南极附近水域的磷虾储量为十多亿吨,在维持生态平衡条件下的潜在捕获量约为5,000万—1亿吨。如将海洋农牧化,1公顷海洋养鱼场可产鱼70—80吨,1公顷“水下菜园”可产海藻60—70吨。在化学、矿产资源方面,海洋中约有80种化学元素,溴的97%存在于海洋中。海水含盐总量为2,200万立方公里,平铺于陆地,厚度达150米。海水里有铀40亿吨,为陆地储量的4,000倍。海水含金600万吨。世界近海石油
First, the rich resources in the oceans The ocean covers about 71% of the Earth's surface with an average depth of about 3,700 meters. In this 1.37 billion cubic kilometers of water, it contains abundant resources. The first is biological resources. The oceans produce 15-18 billion tons of organic carbon each year, with a potential catch of about 240 million tons. Krill stocks in the waters near the Antarctic are more than 1 billion tons and the potential catches under ecological balance are about 50-100 million tons. If the marine agriculture and animal husbandry, 1 hectare marine fish farms can produce 70-80 tons of fish, 1 hectare “Underwater Vegetable Garden ” can produce 60-70 tons of seaweed. In chemistry, mineral resources, there are about 80 kinds of chemical elements in the oceans, 97% of bromine exists in the ocean. The total salt content of seawater is 22 million cubic kilometers, tiled on land with a thickness of 150 meters. There are 4 billion tons of uranium in seawater, which is 4,000 times of land reserves. Seawater gold 6 million tons. World offshore oil