Judgment of the Court (Fifth Chamber) of 29 April 2021.#Granarolo SpA v Ministero dell'Ambiente e della Tutela del Territorio e del Mare and Others.#Request for a preliminary ruling from the Tribunale Amministrativo Regionale per il Lazio.#Reference for a preliminary ruling – Environment – Directive 2003/87/EC – Greenhouse gas emission allowance trading scheme – Article 3(e) – Concept of ‘installation’ – Article 3(f) – Concept of ‘operator’ – Points 2 and 3 of Annex I – Aggregation rule – Aggregation of the capacities of the activities in an installation – Transfer of an electricity and heat cogeneration unit by the owner of an industrial facility – Contract for the supply of energy between the transferor and transferee undertakings – Updating of the greenhouse gas emissions permit.#Case C-617/19.