英文關鍵字
activist
bag
bottle
care
charity
child
cleaning
cleanup
collecting
community
contamination
dirty
disposal
eco
ecological
environment
environmental
garbage
gloves
grass
group
help
junk
lawn
litter
male
man
multiethnic
nature
outdoor
outside
park
participate
person
picking
plastic
pollution
problem
recycling
rubbish
team
teamwork
together
trash
volunteer
waste
woman
working
young