On February 19, 2019, the Green Tank together with the European NGO networks Europe Beyond Coal, Climate Action Network, CEE Bankwatch, the Polish Green Network, the Hungarian Friends of the Earth, Greenpeace and WWF co-signed a letter addressed to the chair of the “Coal Regions in Transition” EC Platform, aiming to improve the just transition process.
On January 24, 2019, the Green Tank together with European NGO networks European Beyond Coal, Climate Action Network and Client Earth sent two letters, one to Commissioners Cañete και Šefčovič and a separate one to Commission Vestager in which they argue for the urgent need to cancel the Greek PPC lignite sale.