Definitionss

• Urbanisation is the increase in the proportion of the population living in urban areas.
• Urban growth the increase in the total population of a town or city.
• urban expansionis the increase in the size of a city (i.e. its geographical footprint)
• Megacity is a city with a population of 10 million people.
• A world city is a city which is disproportionately important in the global economy