Funny thing is air conditioning has only been around a little over 100 years and most of the world doesn't have it. We take a lot of things for granted like assuming everyone can read. Air conditioning can actually be bad for your health...many heat strokes are due to people getting out in the heat that just aren't use to it, the sudden change in temp causes them to get sick. Then there's the mold http://www.pattayadailynews.com/en/2010/06/16/air-conditioners-how-bad-are-they-for-your-health/