What is the difference between industrialization and urbanization ?

Industrialization is the mainly a change from being an agricultural and pastoral society to a more industry based society.When industrialization first emerged as an idea a number of factories were set up .Industrialization marked the beginning of the era of industries.Urbanization on the other hand is associated with the building of towns and cities and the movement of people from villages to more urban areas in search of jobs and a better standard of living.Some of the problems associated with urbanization are: 
1)Affects the environment:usually when new towns and cities are built a number of trees are cut down and a number of wild animals and birds loose their habitat. 
2)An increase in land,air and water pollution:A large amount of waste is generated in cities which ultimately results in land,water or air pollution(air pollution is caused due to the release of gases like sulfur dioxide which is generated by automobiles.) 
3)Problems caused by overpopulation in cities:when people migrate from villages to cities in search of better job opportunities causing overpopulation in cities it can lead to a number of problems like shortage of drinking water,shortage of housing facilities etc.