浜辺
underwater
environmental
biodegrade
carrier
coast
conservation
contamination
coral
danger
dangerous
debris
dirt
dirty
disaster
discarded
dump
ecology
environment
garbage
lake
manmade
marine
messy
nature
ocean
pipe
plastic
pollute
polluted
pollution
recycle
river
rubbish
sand
sea
sewage
sewer
shore
smell
snorkeling
toxic
trash
travel
turtles
undersea
unhygienic
waste
water
white