Someone I knew back when I was in college had a similar theory; but the way he put it was that people who live in hot climates 1) have larger nasal passages so that they can move a lot of air in and out of their lungs to help cool the body and 2) evolve languages that involve large amounts of air moving in and out of the lungs. He said that people in cold climates evolved languages that are more economical of air, to minimize the quantity of air that needs to be warmed before entering the lungs.
The "click" language of the Xhosa, in SubSaharan South Africa, uses less air intake.
Hungarian is part of the Uralic language set which includes Japanese, Sami,and Finnish. It isn't gutteral, nor is it particularly short breathed.