scrap accumulation

例句：

1. 1.The factory has been collecting scrap metals from the streets for years.
   这家工厂多年来一直在收集街道上的废金属。
2. 2. The waste accumulation in the landfill is causing serious environmental problems.
   垃圾填埋场的废料积累正引发严重的环境问题。
3. 3. The company's scrap accumulation is being sold to recycling companies for reuse.
   该公司的废料积累正在被卖给回收公司进行再利用。