White roof ceramic with 99.6% reflectivity enables at least 20% less air-conditioning

https://www.scmp.com/news/china/science/article/3242712/hong-kong-team-says-new-cool-white-ceramic-can-reflect-nearly-all-sunlight-and-cut-air-conditioning

"inspired by white Southeast Asian beetle, porous aluminium oxide scattering almost all wavelengths,  resistant to UV and fire... up to 2.5°C cooler indoors... high weather resistance and mechanical strength, recyclable, Leidenfrost depression (prevents water from evaporating from heated surfaces and faster cooling where fire), optional colors (slightly compromising reflectivity), and self-cleaning when water comes in contact with dust... market launch late 2024"

Related: This adaptive roof tile can cut both heating and cooling costs
https://news.ucsb.edu/2023/021285/adaptive-roof-tile-can-cut-both-heating-and-cooling-costs