人口零增长意味着自然资源的可持续利用和生态环境的逐步改善。春天暖花开性8论坛

　　In the not too distant future, a very smoggy and overpopulated Earth government makes it illegal to have children for a generation. One couple, unsatisfied with their substitute robot baby, breaks the rules and gets in a lot of trouble. (Z.P.G. stands for Zero Population Growth).