product manufacture, product use, and recycling and disposal. Another possible stage not explicitly considered by the EPA guidelines, is illustrated in exhibit 17-6.As shown, the difference life-cycle stages can be under the control of someone other than the producer of the product. Note that the source of materials for the product can come through extraction(raw materials) or from recycling, If all or some of the product’s components cannot be recycled, then disposal is required , and waste management becomes an issue.