We have a moral obligation to protect the environment.

我们有道义责任保护环境。

《牛津词典》

I think we must do something to protect the environment.

我认为我们必须做些什么来保护环境。

youdao

What should we do to protect the environment?

我们应该做些什么来保护环境？

youdao

Miz Lisagore says some readers have decided to work harder to protect the environment.

VOA: special.2009.04.22

In recent years, the racing industry has taken steps to protect the environment.

VOA: special.2009.11.03

Research stations are taking steps to protect the environment.

VOA: special.2009.06.03

But it is increasingly difficult for governments to establish effective measures to protect the environment.

BBC: More

Farmers could be paid twice for measures to protect the environment under a European Parliament deal.

BBC: Farm double payments clear hurdle

It's plastic bags, now banned to protect the environment and the lives of animals and fish.

BBC: Quiz of the week's news