What's this?
crowd
What's this?
recycling bin
What's this?
traffic jam
What's this?
pedastrian crossing
What's this?
post box
What's this?
air polution
What's this?
rubbish
What's this?
water pollution
What's this?
road sign
What's this?
power cut
What's this?
speed limit
What's this?
taxi rank
What's this?
public transport