Why is most of India's population in a tiny area?

India is surpassing China as the world’s most populous country, but most of its population is concentrated in a relatively small geographic area — how come?

The populous area sits below giant mountains (including the Himalayas), and along the Ganges River.

Mountains trap clouds coming from the Indian Ocean, producing lots of rain. This area is one of the most fertile in the world.

There are so many clouds coming from the Indian Ocean in the first place because of the sheer size of Eurasian land mass — land gets hotter than ocean; hot air moves up, pulling clouds in from the ocean.

Fascinating facts I learned from Tomás Pueyo this morning — Thank you for sharing your knowledge with the world!