Without trees, many animals can not live on the earth. It's not easy for man to live on the earth, either.

没有树木，许多动物不能在地球上生活，人类在地球上生活也不容易。

youdao

There, I found open ground without trees.

那儿，我发现一片没有树木的开阔地。

youdao

Without trees, Haiti lost its topsoil through erosion, crippling agriculture.

没有了树木，海地土壤流失，重创了当地农业。

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Without trees, settlers had no wood to build houses.

VOA: special.2010.04.15

Miami recently found that its electricity bills were 10 percent lower in areas with more than 20 percent tree cover compared to those areas without any trees, the New Scientist reports.

CNN: All About: Cities and energy consumption

Did somebody declare war on trees without telling me?

NEWYORKER: Good Neighbors

He knows that big companies will probably never want to make GM versions of a minor crop like walnuts, but he bemoans the fact that protecting his trees without pesticides is expensive (he uses pheromones to lure the insects into mating with everything but one another).

FORBES: Green Genes