You just forgot about the most important.

https://www.google.com.au/search?q=Underground+Tubes+for+Passive+Cooling&newwindow=1&rlz=1C1CHBD_en-GBAU751AU751&source=lnms&tbm=isch&sa=X&ved=0ahUKEwidoJi2j43cAhUBHJQKHXPvBg4Q_AUICigB&biw=1680&bih=917