Nobody can play a role in protecting the earth.

没有人能保护地球。

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"Living green" is to take responsibility for protecting the earth.

“绿色生活”旨在承担保护地球的责任。

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Protecting the earth our homestead is an unshirkable duty for every earthling.

保护地球家园，是每一位在世者义不容辞的责任。

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That was the fate of British Liberal Democrat Lembit Opik, who was widely mocked for his talk about protecting the Earth from asteroids.

BBC: Newt's long shot at the Moon

That is the nature of protecting the earth from impact.

CNN: Space's threat to civilization

Dr Cordey said the company had worked with a number of space authorities on other methods of protecting the Earth from asteroids but this one would be able to target a wider range.

BBC: British plan to tackle asteroids