the growth of megacities

• What is a megacity?


  A city with a population of over 10 million people
• How many megacites were there in 1990 compared to 2014?


  1990- 10 megacities

  2014- 28 megacities
• what is A METACITY?


  A conurbation with over 20 million people
• what are the causes of urban growth?


  • Natural population growth
  • Rural-urban migration
• why is natural population growth a cause of urban growth?


  • Cities have relatively young age profiles
  • These residents are in their fertile years so rates of natural increase are higher
  • IN ENGLAND AND WALES 22-29 AGE GROUP MAKES UP ALMOST HALF OF THE TOTAL POPULATION OF URBAN AREAS
• List some pull factors for rural-urban migration?


  • A perceived better QoL in the city, fed in part by images in the media
  • Better quality social provisions from basic needs (eg healthcare) to entertainment
• List some push factors for rural-urban migration?


  high levels of local diseases and inadequate medical provision

  Natural disasters eg tropical storms - people flee rural areas and do not return.