Nature is kind mother, the butcher is grim.

大自然是善良的母亲，也是冷酷的屠夫。

We can't live without water.

没有水我们就不能生存。

We should take many measures to stop pollution.

我们应该采取许多措施去停止污染。

Without the shade from trees, Earth would get too hot to live on.

没有了树荫，地球将会变得太热而不能生存。

Many rivers and lakes are seriously polluted.

很多河流湖泊已经受到严重污染。

As we know, water is very important to man.

我们知道，水对人类来说是非常的重要。

We need to protect Earth because it is our home.

我们需要保护地球因为它是我们的家。

It's our duty to save water.

节约水是我们每个人的责任。

Not a clean environment, then the living conditions favourable meaningless.

没有一个清洁的环境，再优裕的生活条件也无意义。

Environmental health is our first step towards the protection of green!

环境健康是我们迈向绿色保护的第一步!

这些句子涵盖了保护环境的重要性、水的宝贵、污染的危害以及每个人的责任等多个方面。希望这些句子能对你有所帮助。