"Protecting forests and rivers" 可以用英文表达为 "conserving forests and rivers" 或 "preserving forests and rivers"。
"Conserve" 来源于拉丁语 "conservare"，意思是 "保存、保护"。
"Preserve" 来源于拉丁语 "praeservare"，意思是 "保护、保全"。
例句：
We need to take action to conserve our forests and rivers for future generations. (我们需要采取行动来保护我们的森林和河流，以便于未来的世代。)
It is important to preserve our natural resources, including forests and rivers. (保护我们的自然资源，包括森林和河流是很重要的。)