英文關鍵字
activist
bag
care
child
cleaning
collecting
community
earth
eco
ecologic
ecological
ecology
ecosystem
environment
environmental
female
forest
garbage
girl
green
group
help
litter
male
man
nature
organization
outdoors
park
participation
picking
plastic
pollution
preservation
project
protection
recycle
recycling
resource
responsibility
rubbish
save
social
society
together
trash
volunteer
volunteering
waste
woman