Re:Only solves 50% of the problem (Score 2, Interesting)

You want cool? bury it! The temperature underground tends to stay nice and cool, even during the heat of the summer... If you've ever lived in a house with a full basement... you'll know that during the summer, that basement is the coolest part of the house... Similarly, in the winter time, that basement doesn't get as cold as the rest of the house can... (obviously heat rises so if you heat the house the upper levels will get warmer quicker, but if you didn't heat the house the basement would be the warmest part from the radiant heat in the walls vs the radiant cold upstairs)... Either you should get a nice difference in temperatures between the surface and 10-20 feet underground (maybe less... and you should get a nice difference both durring summer and winter)... or you don't need the ac!