I'm skeptical. Jaipur, right now during the day, has 60% humidity at 90F. If you lower your temperature with transfer into the ground then you're not lowering humidity but only temperature. That means relative humidity will go UP. I suspect even 80F at 90+% humidity will feel really unpleasant.
The article specifically indicates it (and other techniques in concert) works in Jaipur. It's not going to work 100% of the time in all places, but even in hot, humid areas improvements can be made.
> This allows air conditioning to be used very modestly, when it is necessary at all.
I'm not sure why every thread about energy efficiency improvements has people come in and do the "it's not a perfect solution for these edge cases" thing. Everyone knows that already, and it's totally beside the point.
