Sometimes when building a world, and in particular since Tolkien, one may wish to create original languages for the inhabitants. There are some information around the site about the creation of conlang, but @knave made a good summary on our blog. From there, we learn that one of the first step is to decide on the phonemes of the new language.
I was thus wondering whether the climate or geography had some influence in the phoneme used in a given region. Are colder countries more prone to use guttural sounds? Etc.