英文關鍵字
activity
autumn
bag
bags
bottle
care
clean
collection
collects
concept
dirty
earth
eco
ecological
ecology
ecosystem
environment
environmental
forest
garbage
green
hand
helping
human
lifestyle
natural
nature
one
outdoors
outside
packaging
park
person
planet
plant
plastic
pollution
problem
protect
protection
save
traces
trash
tree
trees
volunteer
volunteering
volunteerism
woman
wood