Adopting a law-and-economics perspective on product related environmental impacts is a complex operation, because of the many diffuse emissions from the different life cycle phases, and the many laws and policies employed to address them. The emergence of the notion of the circular economy has increased these complexities, as the number of policy objectives has increased, now covering issues like product durability. This has led in turn to new regulations, including durability standards on vacuum cleaners and lighting products, but also bringing into relief the disharmony between the different environmental parameters such as product durability, on the one hand, and product energy efficiency, on the other. How an appropriate policy mix that is able to address these impacts is therefore of key concern, along with the relationship between different product parameters and different laws. In this chapter, the authors discuss principles on which an appropriate policy mix can be designed to address various life cycle impacts. The various existing laws and policies, their synergies and contradictions, are outlined first, including examples of their effect, before the authors describe principles on which a policy framework addressing product life-cycle impacts could be based.