Glass need to be remelted, EVA (Ethylene Vinyl Acetat) need thermal treatment, and aluminum need remetling and chemical treatment before they may substitute virgin materials in the module assembling process. Meanwhile, chemical treatment is necessary for silicon and silver before recycling in polysilicon production and multi-Si PV cell respectively. When using the LCA dataset for multi-Si PV modules, it is essential to average the values provided by the multiple data sources if discrepancies exist. Consider the data gathered from literature, environmental impact assessment statements, and industry reports. Ensure that the appropriate environmental impact assessments are chosen based on the geographic relevance of the product lifecycle under consideration. Remember to account for any methodological differences between sources and apply consistent system boundaries.