本篇文章主要讲的是循环再利用是否值得我们大费周折?垃圾回收再利用，商品回收再利用，这些回收再利用有利于环境的维护。回收利用需要每一代人的努力。下面前程百利小编带大家一块看一下这篇托福听力背景材料中出现的生词和疑难句，正在备考托福听力的同学可以参考一下。
At Brooklyn's recycling depot, discarded metal and plastic gets bulldozed into a large mound. The stuff is then scooped onto the first of a series of rising conveyor belts, from which the trash is sorted through means both mechanical and manual.
All that effort produces a variety of salable products, from metals to paper fibers. But is it worth it?
In the case of an aluminum can the answer is an unqualified yes. Such a can can be recycled endlessly with no loss of quality. And recycling a can uses less than five percent of the energy that it takes to refine bauxite ore into fresh aluminum.
Recycling is worth it when it comes to all metals, though we're better at recycling aluminum than say neodymium. In principle it could work for plastic, too. But because plastic is made from petrochemicals, low oil prices can make it cheaper to just dump old plastic and manufacture new. And plastics degrade as they're recycled, as does paper.
That said, a simple cost-benefit analysis does not correctly measure the environmental costs of dumping plastics or cutting down more trees for paper products. The EPA suggests that recycling in the U.S. reduces the same amount of greenhouse gas pollution as taking more than 38 million cars off the road.
The sound of recycling may prove music to the ears of future generations.
疑难词汇：
Depot n. 仓库;停车场;航空站vt. 把…存放在储藏处adj. 药性持久的
Bulldoze vt. 强迫;恫吓;用推土机清除
Scoop vt. 掘;舀取;抢先获得;搜集n. 勺;铲子;独家新闻;凹处
Trash n. 垃圾;废物vt. 丢弃;修剪树枝
Salable adj. 畅销的;适于销售的;价格适当的
Aluminum 铝
Neodymium 钕
Petrochemical adj. 石化的n. 石油化学产品
长难句解析：
1. The EPA suggests that recycling in the U.S. reduces the same amount of greenhouse gas pollution as taking more than 38 million cars off the road.
难句类型：
That引导的宾语从句
从句中的句子主干：
recycling reduces the same amount of greenhouse gas pollution
难句拆分：
That引导的宾语从句作suggest
好了，以上就是前程百利小编为大家整理的托福听力背景材料中学单词+疑难句之回收再利用的内容，希望在备考的路上助大家一臂之力。最后，小编祝大家在托福考试中取得好成绩！
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