Judgment of the Court (First Chamber) of 20 January 2021.#Land Baden-Württemberg v D.R.#Request for a preliminary ruling from Bundesverwaltungsgericht.#Reference for a preliminary ruling – Environment – Aarhus Convention – Directive 2003/4/EC – Public access to environmental information – ‘Stuttgart 21’ infrastructure project – Refusal of a request for environmental information – Article 4(1) – Grounds for refusal – Term ‘internal communications’ – Scope – Limitation in time of the protection of such communications.#Case C-619/19.