保护水用英语应该怎么说

To protect water in Engpsh, you can say "conserve water," "protect the water supply," or "prevent water pollution." Here are a few more suggestions:

Protect our water resources
Keep our water clean
Safeguard our water supply
Preserve water for future generations

There are many different ways to express the idea of protecting water in Engpsh, depending on the context and the specific message you want to convey.