英文關鍵字
bottle
brown
canal
chemical
city
cleanup
color
contamination
damage
danger
dirt
dirty
disaster
drain
drainage
dump
ecological
ecology
environment
environmental
facility
factory
flow
flowing
garbage
global
green
horror
industrial
industry
junk
lake
motion
mud
natural
nature
oil
outdoor
pipe
pipeline
plant
plastic
pollute
polluted
pollution
pond
pouring
problem
recycle
recycling
removal
river
rotting
sanitation
sea
sewage
sewer
shore
sludge
smell
smelly
splash
stream
substance
surface
system
town
toxic
trash
treatment
unhygienic
unpleasant
urban
waste
water