Schematic illustrations (IMAGE) City University of Hong Kong Caption Schematic illustrations of the ultrathin, soft, radiative-cooling interface layer (USRI) with hollow silicon dioxide microsphere, titanium dioxide nanoparticle and fluorescent pigment components. Credit ©Li J. et al, https://www.science.org/doi/10.1126/sciadv.adg1837 Usage Restrictions Image must be used with appropriate caption and credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.