cities with more than 10 million inhabitants.

By 1980, these were joined by Mexico City, Sao Paulo, and Osaka.

In 2010, there were over 20 megacities spanning almost every continent.

Today, there are 32 megacities.

Urbanisation is happening faster than at any time in human history.

Asia accounts for over half of today's megacities.

By 2030, nearly 9% of the world's population will live in 41 megacities,

but it's in Africa where some of the most rapid urbanization will take place in the future.