why are people pushed to cities?
poverty, no land, declining work opportunities, famine, war
urbanisation
the percentage of the people in a country or in the world living in urban areas
how do urban areas grow?
natural increase, immigration, birth rates exceeding death rates
urban geographics
megacity
population of 10mil+ people
megalopolis
e.g. bowash (boston-washington)
e.g. chipitts (chicago-pittsburgh)