The emergence of megacities 1

Why do cities grow?

More than half of the world's population now live in urban areas, and cities all over the world are continuing to grow. There are two main reasons why cities are getting bigger.

Rural-urban migration - the movement of people from the countryside into towns and cities

Natural increase - where the birth rate is higher than the death rate

A natural increase in population occurs when there is high proportion of young adults aged 18-35. Therefore, more children will be born. The smaller proportion of older people means the death rate is lower…