人口、粮食、环境、资源是当今世界面临的四大问题，可见，新编教材增设“人口与环境”一节课是十分必要和有重大意义的。教材从四个层次：①世界和我国人口的增长；②人口增长和资源危机；③人口增长与生态平衡；④计划生育，比较扼要地说明了人口与环境的关系，人口的发展状 Population, food, environment, and resources are the four major problems faced by the world today. It can be seen that it is necessary and significant for the new textbook to add a “population and environment” lesson. The textbooks cover four levels: 1 The growth of the world and the population of our country; 2 Population growth and resource crisis; 3 Population growth and ecological balance; 4 Family planning, which shows the relationship between population and the environment, population development