Imagine having to live through a South Florida summer without air conditioning. Air conditioning has only been around for about 100 years and it has completely changed life as we know it. Before the days of air conditioning, people had no other choice but to bare with humidity and heat in homes, apartment buildings, offices, hospitals, and etc. Modern society could not operate as efficiently without air conditioning and many businesses would have to close down in the summertime because humidity can severely affect a building.
Appreciate the beauty of air conditioning by reading this Popular Mechanics article.