英文關鍵字
algae
assortment
bag
blue
bottle
climate
clip
color
conservation
damage
dark
day
debris
dirty
disgusting
dull
dump
ecology
environment
environmental
garbage
grass
green
habitat
jugs
litter
nature
nobody
ocean
outdoor
plastic
plastics
pollute
polluted
pollution
problem
recyclable
recycle
recycling
rubbish
trash
waste
white