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塑料垃圾因为难以被自然分解一直令人类感到头疼。近年来,许多易于被自然分解的塑料代用品纷纷问世,这是人类为减少塑料垃圾的一种努力。但是,这种努力几乎没有成效,因为据全球范围内大多数垃圾处理公司的统计,近年来,它们每年填埋的垃圾中,塑料垃圾的比例不但没有减少,反而有所增加。以下哪项如果为真,最能削弱上述论证?
D.上述垃圾处理公司绝大多数属于发达或中等发达国家。

A.近年来,由于实行了垃圾分类,越来越多过去被填埋的垃圾被回收利用了。
B.塑料代用品利润很低,生产商缺乏投资的积极性。
C.近年来,用塑料包装的商品品种有了很大的增长。

【参考答案】

A
解析:题干的结论是:塑料代用品的使用并没有减少塑料垃圾。其论据是:每年填埋的垃圾中塑料垃圾的比例不但没有减少,反而有所增加。如果A项为真,则说明近年来每年填埋的垃圾总量大大减少。因此,虽然每年填埋的垃圾中塑料垃圾的比例没有减少,但总量却可能明显减少,这就有力地削弱了题干的论证。商品品种增...

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