Case T-9/19: Judgment of the General Court of 27 January 2021 — ClientEarth v EIB (Environment — Financing of a biomass power generation plant in Galicia — Resolution of the Board of Directors of the EIB approving the financing — Access to justice in environmental matters — Articles 9 and 10 of the Aarhus Convention — Articles 10 to 12 of Regulation (EC) No 1367/2006 — Request for an internal review — Refusal of the request as inadmissible — Action for annulment — Admissibility of a ground of defence — Obligation to state reasons — Concept of an act adopted under environmental law — Concept of an act having a legally binding and external effect)