> “That is to say that if you reduce air conditioning throughout your life … when you get to 30 degrees in the office, you won’t be hot. In La Réunion, people are used to 30 degrees.”

Your mileage may vary. I live without air conditioning, but when it’s 30, I’m pretty tempted to defect. But I also tend to run hot.

It really depends on the humidity. 30 degrees in my dry hometown in central Spain is tolerable, 30 degrees with 90% humidity here in Japan where I live now is pure pain.