英文關鍵字
agronomist
clean
debris
dirt
dirty
discard
dump
dumped
ecology
environment
filth
foot
garbage
grime
ground
heap
heaps
junk
junkyard
landfill
litter
littering
look
man
mess
midden
mire
mud
nature
organic
pile
plastic
pollution
recycle
recycling
rubbish
sack
shrugs
throw
trash
trees
utilization
walk
warehouse
waste
wood
worker