Possibly because they are not desirable places to live in.
mountain thinly populated
Densely populated areas have more units per unit of area than moderately populated areas. Example: If 100 people in a store is densely populated; 75 in a store of the same size would be moderately populated.
its OVER populated
The Atlantic Coast is the most populated area of the Americas. Other majorly populated areas are the Pacific Coast, Central America, and the Gulf Coast.
the whole country is sparsely populated
Unlike the United States, the inland areas of Mexico are the most populated throughout the country.
urban relates to the area surrounding cities and well populated areas. rural relates to a sparsely populated areas, usually farmland or country areas.
Metropolitan areas of Pakistan are the most densely areas. Karachi is the most densely populated city of Pakistan.
overpopulated
In the heavily populated areas and areas of heavy industry
Japan over populated. It's population is 127076183.
populated areas.