英文關鍵字
barrel
bin
black
board
can
clean
concept
container
disposal
drop
eco
ecological
ecology
education
empty
environment
garbage
girl
green
grid
hand
litter
litterbin
litterbox
man
nature
outside
paper
person
place
plastic
pollution
prevent
protect
public
recycable
recycle
recycling
reduce
reuse
rubbish
throw
trash
trashcan
uhd
waste
wastepaper
white