英文關鍵字
animals
bamboo
beach
bottle
box
cleaning
cleanup
coast
coastline
dirt
dirty
disaster
dump
eat
ecology
environment
environmental
floated
foam
garbage
garden
glass
hide
industrial
insects
landfill
landscape
leaves
litter
marine
messy
nature
ocean
oriental
outdoors
paper
plastic
pollute
polluted
pollution
recycle
recycling
river
rlake
rubber
sand
sea
sewage
shoe
shore
small
surface
thrown
toxic
trash
unhygienic
was
waste
water
wave
weed
whipsnake