You can join a tree planting project such as the ones mentioned above to help save the earth.

你可以参加像上述所提到的一些植树项目来拯救地球。

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The use of S'Cool Bus shows us that we can save the Earth in many ways as long as we want to have a try.

S'Cool 巴士的使用表明，只要我们想尝试，我们可以用很多方式来拯救地球。

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How to save the earth?

如何拯救地球？

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You want to save the earth, but you're not ready for a hybrid car.

FORBES: Magazine Article

Falling fertility may be making poor people's lives better, but it cannot save the Earth.

ECONOMIST: Demography, growth and the environment

And a scientist claims he has a way to save the Earth from global warming, for a while at least.

NPR: Could You Be the Great American Novelist?