Have you ever listened to this word : Gentrification ?

Do you believe there are more pros or cons in this "movement" "process " and trend ? Can gentrification be considered a modern urbanization process ? Why are there so many people against this gentrification process ? Which effects getrification causes on social,economic and physical existing urban districts ? Watch the videos below so that you may answer these questions,ok ?

http://www.macmillandictionary.com/dictionary/british/trend_1