If you look at it ecologically, deforestation is high on the list of things which bring devastation. You cut down trees to build homes, for fuel, and you end up with no trees left, and you have to move on. If you take the earth as a whole, eventually there's nowhere to move on to.
如果你从生态学的角度来看，森林砍伐是造成破坏的首要原因。你砍伐树木来建造房屋，作为燃料，结果你没有树了，你必须继续前进。如果你把地球作为一个整体，最终你将无处可去。
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