Case C-619/19: Judgment of the Court (First Chamber) of 20 January 2021 (request for a preliminary ruling from the Bundesverwaltungsgericht — Germany) — Land Baden-Württemberg v D.R. (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)