自然环境的基本构成自然环境由阳光、空气、水、土壤和各种生物构成。人们又常常把自然环境分成大气圈、水圈、岩石圈和生物圈。海洋中的生物资源海洋拥有地球上80%以上的生物资源。其中,动物18万种,植物2万多种。生物圈的范围从地壳表面或海洋深12千米处到大气对流层10千米高 The basic composition of the natural environment The natural environment consists of sunlight, air, water, soil and various organisms. People often divide the natural environment into the atmosphere, the hydrosphere, the lithosphere and the biosphere. Biological Resources in the Ocean The ocean owns more than 80% of the biological resources on Earth. Of these, there are 180,000 animals and more than 20,000 species of plants. The biosphere ranges from 12 kilometers deep at the crust surface or the ocean to 10 kilometers above the atmospheric troposphere