环境保护论

例句：

1. 1.The government has proposed a series of measuresto protect the environment.
   政府已经提出了一系列保护环境的措施。
2. 2. Environmental protection is an importantissue that needs to be addressed.
   环境保护是一个需要被解决的问题。
3. 3. The environmental protection theory emphasizes the importance of preserving natural resourcesand protecting the ecosystem.
   环境保护理论强调了保护自然资源和生态系统的重要性。