Mortality impacts of air pollution and greenness: real-world and counterfactual exposure scenarios in seven Northern European cities - Shanshan Xu; Alessandro Marcon; Randi Jacobsen Bertelsen; Bryndis Benediktsdottir; Jørgen Brandt; Lise Marie Frohn; Camilla Geels; Thorarinn Gislason; Joachim Heinrich; Mathias Holm; Christer Janson; Andrei Malinovschi; et al. (Environmental Research, 2026)