Hacker News Reader

Not disagreeing, but Dubai is not a good example since Dubai is as hot as Dubai, and a lot of extremely wealthy people still live there.

True. But they mostly live indoors, except at night. And it takes a lot of energy for air conditioning! See http://gulfnews.com/business/economy/uae-s-per-capita-energy...

How many of those people are wealthy by virtue of being the citizens there? How many people who are _not_ from UAE choose to live there?