SortStack #2574 — 2033-06-26

By population · Order from fewest to most people.

1. The population of Reykjavík 140K

   The world's northernmost capital heats its streets and pavements with volcanic geothermal water.

2. Greater Shanghai 29M

   Its metro system, opened only in 1993, is already the longest in the world.

3. The population of Germany 84M

   The EU's most populous country — yet its capital is only its third-densest city.

4. The population of Vietnam 100M

   Roughly 40 percent of all Vietnamese share the surname Nguyen.

5. Natural redheads worldwide 140M

   Just one to two percent of humanity; the gene is recessive, so it can skip generations.

6. The population of India 1.4B

   Now the world's most populous country — one in six humans is Indian.

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