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1：但近年来，随着环境损害的日益严重，世界各地已经出现了许多变化的迹象。

But for the past few years, with the more and more damage to the enviroment, many changes have taken place aroud the world.
2：但是一系列新的环境保护法还是出台了，并新建了占四分之一国土面积的公园和自然保护区，目的是要保护哥斯达黎加现存的森林。
But a series of new enviroment protection acts have been carried out, and also parks and nature protection zones covering a quarter of the total national area have been newly built up, to protect the Costa Ria's remaining forests.