In addition, there is a disparity between MSW composition in the region of Crete (2003–2004) and MSW composition suggested in the National Solid Waste Planning (2000). This is observed not only in the putrescibles and plastics fractions, but also in materials that seem to have an important seasonal variation in the region of Crete (e.g., glass). Hence, MSW composition data of National Solid Waste Planning cannot be applied in the region of Crete or in other regions with similar characteristics to Crete.