Judgment of the General Court (Second Chamber) of 26 July 2023.#Luossavaara-Kiirunavaara AB v European Commission.#Environment – Directive 2003/87/EC – System for greenhouse gas emission allowance trading – Transitional free allocation of greenhouse gas emission allowances – Installations producing a product which is not covered by a product benchmark – No direct substitutability between the products – Rejection of data relating to the free allocation of allowances concerning those installations – Obligation to state reasons – Manifest errors of assessment – Equal treatment – Duty of diligence – International obligations and commitments of the European Union – Plea of illegality.#Case T-244/21.