Permafrost around A lot of Siberia is A serious impediment to development; volcanic activity while in the Kuril Islands; volcanoes and earthquakes over the Kamchatka Peninsula; spring floods and summer time/autumn forest fires in the course of Siberia and portions of European Russia that the development in the East Slavs https://brooksq4k95.actoblog.com/31417054/the-russia-diaries