英文關鍵字
adult
awareness
bag
bottle
boy
caucasian
child
clean
collect
community
concept
day
earth
eco
ecology
environment
family
garbage
gloves
green
help
kid
lake
litter
little
nature
outdoor
park
people
person
picking
plastic
pollution
protection
recycle
recycling
reuse
river
rubbish
sand
scavenge
smile
social
straw
trash
volunteer
volunteers
waste
water
work