Judgment of the Court (Tenth Chamber) of 16 February 2023.#European Commission v Hellenic 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 the limit values for nitrogen dioxide (NO2) in the agglomeration of Athens (Greece) – Article 23(1) – Annex XV – Exceedance period to be ‘as short as possible’ – Appropriate measures.#Case C-633/21.