Case T-269/21: Judgment of the General Court of 26 July 2023 — Arctic Paper Grycksbo v Commission (Environment — Directive 2003/87/EC — Scheme for greenhouse gas emission allowance trading — National implementing measures — Transitional free allocation of greenhouse gas emission allowances — Decision to exclude an installation exclusively using biomass — Duty of diligence — Right to be heard — Obligation to state reasons — Manifest error of assessment — Equal treatment — Legitimate expectations — Plea of illegality — Paragraph 1 of Annex I to Directive 2003/87)