Before revision: Colonization and immigration in the last 400 years have been causing steady population growth in formerly less populated mountain areas in Africa, Australia, New Zealand, South America, Canada and the Western United States .
After revision: ,also in some places such as talysh people lands in iran there are people who still live on mountainsColonization and immigration in the last 400 years have been causing steady population growth in formerly less populated mountain areas in Africa, Australia, New Zealand, South America, Canada and the Western United States .