英文關鍵字
recycling
metal
recycle
symbol
mixed
cans
tins
pile
tin
recycles
recycled
concept
aluminum
aluminium
steel
iron
lots
material
factory
sorting
facility
center
green
environmental
environmentalism
environmentalist
box
container
rubbish
garbage
piles
piled
canned
tinned
food
household
home
waste
metals
graphic
clean
energy
reusable
mixture