Case C-342/21: Judgment of the Court (Tenth Chamber) of 9 February 2023 — European Commission v Slovak Republic (Failure of a Member State to fulfil obligations — Environment — Directive 2008/50/EC — Ambient air quality — Article 13(1) and Annex XI — Systematic and persistent exceeding of the limit values applicable to microparticles (PM10) in certain zones of Slovakia — Article 23(1) — Annex XV — Period during which those limit values are exceeded ‘as short as possible’ — Appropriate measures)