人类为了生存和活动,需要不断从环境中吸取营养物质,必须占有包含空气、水、阳光等媒体介质的一定空间。同时人类新陈代谢和活动的产物又要排放到环境中去,环境还要有容纳、清除和改变这种代谢产物的能力。人类生活和生产,离开特定的环境,人类就无法生存,那么如何对环境进行合理有效的保护呢, In order to survive and act, human beings need to constantly absorb nutrients from the environment and must occupy a certain space containing media such as air, water and sunlight. At the same time, the products of human metabolism and activity have to be discharged into the environment, and the environment also has the capacity to contain, remove and change the metabolites. Human life and production, leaving a specific environment, human beings can not survive, then how to protect the environment reasonable and effective,