Why is it difficult to identify the resource a product was made from?

Identifying the resource a product was made from can be challenging due to several factors, including complex supply chains that involve multiple materials and processes. Additionally, products often undergo significant transformations during manufacturing, making it hard to trace the original resource. Lack of transparency in sourcing practices and limited labeling information further complicate identification efforts. Furthermore, the use of synthetic materials and composites can obscure the origins of the raw materials used.