定语从句

The Yangtze River is the longest river in China, which is prevented from being polluted.

状语从句

If we don't take action now, the environmental damage will become irreversible.

宾语从句

We believe that everyone has a role to play in maintaining a clean environment.

主语从句

It is clear that the protection of our environment is crucial for future generations.

表语从句

The problem is that we are not doing enough to prevent pollution.

这些从句可以帮助你更准确地表达环保相关的概念和观点。