Geography
Why Population Density Varies Between Mountain and Coastal Regions
Quick fact
Over 40% of the world's population lives within 100 km of a coastline, even though coastlines make up only about 20% of Earth's land area.
Why this is interesting
Why do most of the world's major cities hug coastlines, while mountain ranges remain sparsely populated? The answer lies in a mix of geography, climate, and economics.