The fabrication and application of MJF-printed SSGs. (a) Synthesis process of the C@Fe3O4 ink for MJF printing. (b) Illustration of the MJF testbed setup and the structure of printed SSGs. (c) Schematic illustration of transpiration in plants and water transport in trunk and porous materials. (d) The illustrated evaporation process of water on the surface of MJF-printed SSG under solar irradiation.