選択的
environmental
abandoned
blue
careless
copy
damage
desert
dirty
discarded
disposal
dump
dumped
dumping
ecology
empty
environment
focus
garbage
illegal
indifference
issue
litter
mountains
neglect
nobody
obsolete
outdoors
pollution
problem
recycle
recycling
rejected
rubbish
rust
rusted
scrap
sky
space
trash
waste