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large groups of people who are together in one place
crowds
writing or pictures painted on walls and public places, usually illegally
graffiti
areas of grass, trees or other plants in a town or city
green spaces
damage caused to water, air, etc. by harmful substances or waste
pollution
when the supply of electricity suddenly stops
power cut
a system of vehicles such as buses and trains which operate at regular times and that the public use
public transport
things that you throw away because you do not want them
rubbish
the time when a lot of people are travelling to or from work and so roads and trains are very busy
rush hour
a line of cars, trucks, etc. that are moving slowly or not moving at all
traffic jam
a building that is divided into apartments
apartment building
a place where buses stop to let passengers get on or off
bus stop
a special place on a road where traffic must stop if people want to cross
pedestrian crossing
a large, metal container in a public place where you can post letters
post box
a container for waste that will be recycled, for example, paper or glass
recycling bin
a notice at the side of a road which gives information, directions, a warning, etc.
road sign
the fastest speed that a vehicle is allowed to travel on a particular road
speed limit
