英文關鍵字
ackgrounds
bird
bottles
bulky
cleanup
concepts
conservation
dirt
dirty
dump
environment
food
garbage
global
group
heap
industry
junk
land
landfill
large
life
midden
mountain
nature
no
objects
obsolete
of
outdoors
packages
paper
part
people
plastic
pollution
putrid
recycling
rotting
ruined
seagull
sky
stack
substance
sun
toxic
urban
waste