英文關鍵字
activist
adult
altruism
assemble
bag
bin
care
change
charity
children
cleaning
climate
collecting
congregate
earth
eco
ecology
ecosystem
environment
fall
female
garbage
gather
gloves
grabber
green
help
litter
male
man
moral
park
participate
picking
planet
plastic
pollution
recycling
rubbish
saving
scavenge
spring
team
trash
volunteering
waste
water
woman
working
young