英文關鍵字
air
art
background
biodegradable
blue
bottles
collection
conservation
contamination
creased
crushed
dark
dumping
earth
eco
ecology
empty
environmental
garbage
industry
isolated
litter
management
nature
nobody
object
pile
plastic
pollution
polyethylene
problem
protection
recycling
reduction
reuse
rubbish
save
texture
trash
used
waste
wrinkled
zero