Case C-644/18: Judgment of the Court (Grand Chamber) of 10 November 2020 — European Commission v Italian 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 exceedance of limit values for microparticles (PM10) in certain Italian zones and agglomerations — Article 23(1) — Annex XV — Exceedance period to be ‘as short as possible’ — Appropriate measures)