据估计，每栋大楼都有多达78000吨的可回收性钢材。
It is estimated that each tower had up to 78, 000 tonnes of recyclable steel inside it.
回收设计是提高产品的可回收性，进而提高产品的环境属性的有效途径。
Design for recyclability (DFR) is an efficiency way to improve the recyclability and the environmental performance of products.
而且，回收性砍伐比传统的砍伐活动需要更多的人力，所以这可以为当地居民提供更多的就业机会。
Furthermore, salvage logging requires more workers than traditional logging operations do, and so it helps create additional jobs for local residents.
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