英文關鍵字
activist
adult
assistance
bag
bottle
can
care
change
charity
clean
collect
community
cooperation
dirty
earth
eco
ecology
education
environment
environmentalist
forest
garbage
glove
hand
help
human
man
nature
one
outside
park
person
photography
plastic
pollution
problem
recycling
responsibility
rubbish
service
trash
unrecognizable
volunteer
waste
woman
working
young