Urbanization is the increase in the proportion of people living in cities and is occurring as people migrate from rural to urban areas as countries develop. This document discusses the causes, effects, and impacts of urbanization. The causes include population pressure in rural areas, belief of better standards of living in cities, and natural population increase. The impacts include economic, political, social, cultural, and environmental factors affecting cities as well as socio-cultural and socio-economic impacts on surrounding rural areas and within cities. While urbanization provides benefits like economic growth and services, it also leads to issues like pollution, poverty, overcrowding, and infrastructure challenges.