The document outlines the key parts and facilities of a city as well as common city problems. It discusses the various zones that make up a city including the city centre, factories, green spaces, industrial zones, and residential zones. It also lists important city facilities such as bike lanes, car parks, escalators, football stadiums, motorways, shopping centres, sports facilities, and transport links. Finally, it mentions problems cities often face including crime, litter, pollution, population increase, traffic jams, and noise.