Waste is defined as ‘any substance or object which the holder discards, or, intends or is required to discard.’ Waste is classified according to the Statistical European Waste Classification (EWC-Stat. Version 4). This classification has been published in the Waste Statistics Regulation 2150/2002 (WStatR) and is a substance-oriented nomenclature used to report waste generation data. According to Annex 2, Section 2 of the WStatR, for reporting purposes, the EWC-Stat is aggregated into 51 items. Waste treatment refers to waste undergoing recovery and disposal operations within the geographical territory of the country. Recovery and disposal operations are classified according to the items published in Annex 2, Section 8 of the WStatR and comprise Backfilling, Energy Recovery and Recycling under Recovery, and Incineration, Landfill and Other operations under Disposal.