教学目的:1.生物圈的概念(理解);生物圈稳态能够自我维持的原因(理解);酸雨等全球性环境问题(理解)。2.通过学习生物圈的概念,理解生物与无机环境的和谐统一,增强保护环境的意识。3.通过学习生物圈稳态的自我维持,理解生物圈稳态的原因,树立人类社会可持续发展的观点。 Teaching Objectives: 1. The concept of the biosphere (understanding); the reasons why the biosphere can maintain its own homeostasis (understanding); and global environmental issues such as acid rain (comprehension). 2. Through the study of the concept of the biosphere, understand the harmonious unity of biological and inorganic environment and enhance the awareness of environmental protection. 3. By studying the self-sustainment of the biosphere steady state, understand the reasons of the biosphere steady state, and establish the sustainable development of human society point of view.