The podcast 99% Invisible had an episode[1] earlier this year that featured some of these passive innovations like India's stepwells[2] [1] https://99percentin

The podcast 99% Invisible had an episode[1] earlier this year that featured some of these passive innovations like India's stepwells[2] [1] https://99percentinvisible.org/episode/thermal-delight/ https://99percentinvisible.org/episode/thermal-delight/ [2] https://en.wikipedia.org/wiki/Stepwell https://en.wikipedia.org/wiki/Stepwell