英文關鍵字
bin
city
clean
collection
conservation
container
cup
disposal
dump
dustbin
eco
ecological
ecology
environment
environmental
garbage
girl
green
hand
junk
litter
nature
object
organic
outdoor
outdoors
paper
park
person
plastic
pollution
protection
recyclable
recycle
recycled
recycling
reuse
rubbish
separation
sign
street
throw
throwing
trash
urban
waste
woman