英文關鍵字
blowing
cellulose
clean
concept
contamination
cup
damage
destruction
discard
earth
eco
ecology
emotions
environment
environmental
field
forest
future
garbage
global
globalization
grass
green
hand
help
impact
irresponsible
land
litter
paper
person
picnic
planet
pollution
problem
protect
recycle
responsibility
rubbish
save
singleusing
stop
throwing
toxic
tree
used
view
waste
wind
world