英文關鍵字
bag
black
bottle
charity
child
clean
cleaning
cleanup
collect
collecting
collection
collector
community
day
dirty
disposal
ecology
environment
environmental
family
forest
garbage
group
guy
happy
human
kindness
litter
one
people
pick
plastic
recycle
river
rubbish
save
services
teamwork
throwing
together
trash
volunteer
waste
work
worker
youth