on Ireland

Q: Why is the population so big?

A: Because it's Dublin.

5th biggest province

With 2.7 million people, the city of Toronto is larger than half the Canadian Provinces and contributes 20% of GDP.

"Half the world lives on less than $2/day."
- Global Issues

how many people have ever lived

Source here.

world's largest ethnic group

Han Chinese constitute 20% of the world's population ; 1.3 billion people.

Image source here.