Waste plastics may instead be stored or burned openly. In Europe, plastics were one of the last materials to be added to the materials collection portfolios of local authorities because of their low' value and high transport costs. It is likely that they w'ould not be collected in higher income countries if regulation was not in place to drive the process. However, it is mainly distribution film and EPS rather than food and beverage containers. Collection of these materials is likely to be more profitable because the material is often more consistent, free from contamination, and arises in larger quantities (Villanueva and Eder, 2014|14]). The flow' charts in Figure 4.2 and Figure 4.3 illustrate the supply chain for post-consumer and post-industrial w'aste respectively, highlighting the differences between how the tw o categories of material are collected, contained, transported and treated.