Overview of magma ocean solidification time (left) and the remaining water in the solid mantle compared to initial water mass in percent (right) for TRAPPIST-1 e (red), f (green), and g (purple), considering various CO₂ contents for albedo 0.75 (top panels) and albedo 0 (bottom panels). Solid lines represent scenarios with pure H₂O atmospheres, dash-dotted lines denote scenarios with added CO₂ scaled by 0.3x compared to the initial H₂O mass, and dotted lines show scenarios with added CO₂ equal to the initial water mass. Colored shaded regions denote the time, when the respective planet enters the habitable zone.