I found the question interesting and found a few Wikipedia articles that might help: https://en.wikipedia.org/wiki/Passive_cooling https://en.wikipedia.org/wik

I found the question interesting and found a few Wikipedia articles that might help: https://en.wikipedia.org/wiki/Passive_cooling https://en.wikipedia.org/wiki/Passive_cooling https://en.wikipedia.org/wiki/Bâdgir https://en.wikipedia.org/wiki/Bâdgir https://en.wikipedia.org/wiki/Yakhch%C4%81l https://en.wikipedia.org/wiki/Yakhch%C4%81l