At one time they were the most literate people in America. Other groups with a large number of speakers and classes and programs to learn it are largely in Canada. Inuit is even the language of government in one province. I would choose a Canadian version of Inuit unless you have access to Greenland.
Answer is Ionosphere. The ionosphere is a layer of ionized air in the atmosphere extending from almost 80 km above the Earth's surface altitudes of 600 km and more. Technically, the ionosphere is not another atmospheric layer. [ It occupies the same region of the upper atmosphere as the thermosphere. In this region of the atmosphere the Sun's energy is so strong that it breaks apart molecules. and atoms of air, leaving ions (atoms with missing electrons) and free-floating electrons. The ionosphere is the region of the atmosphere where the aurorae occur.
The innermost layer, the troposphere, contains most of the planet's weather and extends out to 10â15km above the surface. The next layer out, the stratosphere, is drier and less dense and extends out to about 50km. The Sun's UV light breaks down oxygen in the stratosphere to form the Earth's protective ozone layer. The mesosphere, thermosphere, and ionosphere make up the remaining outer layers that extend out to about 100km. Image: The rising Sun highlights Earth's atmosphere in this photo taken from the International Space Station (credit: NASA/SPL).