Why does most of eastern russia have a low population density?

Most of the region is located within tundra and subarctic climate zones.

Explanation:

The region of Eastern Russia has a low population density because the area is too cold to support human habitation. Eastern Russia is known as the Russian Far East, which has long cold winter and small summer. The population in Eastern Russia has been swiftly falling since the end of the Soviet Union. Before 2010 the district was not connected with the rest of the country through highways. In the recent period, President Vladimir Putin announced the Russian Homestead Act in 2016 in the Russian Far East.  

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