联合国环境规划署警告说，除非有步骤地采取合理的材料收集和回收措施，否则后果将是灾难性的。
The consequences could be disastrous unless action is stepped up to properly collect and recycle materials, the agency warned.
目前，尽管原材料加工需要额外的能源，但往往很便宜，因为回收时收集和分类需要更多劳动力。
At the moment, it is often cheaper to process virgin materials, despite the extra energy required, because collecting and sorting recyclables is so labour-intensive.
对回收的调查问卷和走访过程中收集的材料进行统计、整理。
The recovery of the survey questionnaire and interviewed in the course of the material gathered statistics, collate.
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