In the circular economy one of the most controversial sticking points is the supply of material to recycle or regenerate. As William McDonough outlines in this issue of Renewable Matter, waste should not be considered necessarily and only as a negative externality with a powerful effect on environment and health. Rather, it needs to be seen as a “raw” material of great value, scarce (in terms of economics) and subject to strong competition for its use. Hence, supply is a key factor and it requires clever design of the whole supply chain. Often, though, collecting “quality” refuse is anything but simple. Renewable Matter analyses several case studies in order to show how, in different sectors, industry is getting equipped to create an industrialized supply chain. That...