英文關鍵字
activist
bag
care
child
clean
closeup
collecting
earth
eco
ecology
ecosystem
elderly
environment
environmental
family
female
five
forest
garbage
gesture
girl
granddaughter
group
help
high
kid
litter
male
man
nature
old
park
participation
picking
plastic
pollution
preservation
project
protection
recycling
resource
responsibility
rubbish
save
senior
togetherness
trash
volunteer
volunteering
waste