英文關鍵字
bin
can
city
cleaner
cleaning
collecting
consumer
consumerism
consumption
container
crowd
dirty
disposal
dustbin
ecology
environment
environmental
female
garbage
gathering
global
hard
job
life
litter
low
male
man
menial
municipal
occupation
paid
people
pollution
problem
profession
recycling
rubbish
salary
street
sweeper
throwing
trash
urban
wage
waste
woman
work
worker
world