We need to protect the environment of the Earth.

我们需要保护地球的环境。

On the earth, we need to protect the environment.

在地球上，我们需要保护环境。

Mankind needs to protect the Earth's environment.

人类需要保护地球环境。

We need to reduce exhaust gases to protect the Earth.

我们需要减少排放气体以保护地球。

Environmentalists are working hard to protect the Earth.

环保人士们正在努力保护地球。

We should use more degradable products to protect the Earth.

我们应该使用更多可降解的产品来保护地球。

They threw themselves into environmental activities to protect the Earth.

他们投身于环保活动，保护地球。

More importantly, we can help protect the Earth's most valuable resources.

更重要的是，我们可以帮助保护地球上最宝贵的资源。

Support our campaign to protect the Earth's species

支持我们的保护地球物种动物吧。

Protect the earth's environment-the homeland of all mankind.

保护地球环境-人类共家园。