In 1900, just 15% of the world’s population lived in cities. Now that proportion is over 50%, which is a lot of people. In fact, it means around 4 billion human beings rely on urban infrastructure to keep them warm, mobile and clean.
In 1900, just 15% of the world’s population lived in cities. Now that proportion is over 50%, which is a lot of people. In fact, it means around 4 billion human beings rely on urban infrastructure to keep them warm, mobile and clean.