[1]国际劳工组织,童工:全球估算2020,趋势和道路前进,https://www.ilo.org/wcmsp5/groups/publics/public/----------------------------------------------投物/[2] https://www.dol.gov/agencies/ilab/reports/child-labor/list-labor/list-of-goods-print; [3] https://www.epa.gov/facts-and-figures-figures-about-materials-waste-and-recycling;初步结果 - 不要分发,引用或引用。