RUSH HOUR - the time of day when the roads and means of transport are most full, because people are travelling to or from work., CROWD - a large group of people who have gathered together to do something., TRAFFIC JAM - a long line of vehicles on a road that cannot move or can only move very slowly., GRAFFITI - rude, humorous, or political writing and pictures on the walls of buildings, trains etc, GREEN SPACES - an area of grass, trees, or vegetation set apart for recreational or decorative purposes in an urban environment., POLLUTION - the process of making air, water, soil etc dangerously dirty, or the state of being dangerously dirty, POWER CUT - a period of time when there is no electricity supply, PUBLIC TRANSPORT - buses, trains etc that are available for everyone to use, RUBBISH - food, paper etc that is no longer needed and has been thrown away,

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