An unfamiliar landlocked exclave of the former Soviet Union between Armenia, Iran, and Turkey blossoms as one of the most sustainable nations for many reasons. Nakhchivan is relatively unknown to many in the Russian-speaking world. It is popularly known as the “land of prophet Noah” as it is believed to be where he is buried in a towering mausoleum. With its rich history, they have managed to become self-sufficient from their land produce and was recognized as the world’s few examples of a loose economic autarky. Also, Nakhchivanis are proud of their region’s cleanliness and locavore taste.
Source: http://www.bbc.com/travel/story/20200721-nakhchivan-the-worlds-most-sustainable-nation