英文關鍵字
1920x1080
color
contamination
damage
danube
day
dirty
drain
drainage
dump
ecology
edge
environment
environmental
exterior
flowing
flying
garbage
industrial
industry
lighting
liquid
mud
natural
nature
people
polluted
pollution
real
river
riverbank
riverside
running
scene
seagull
seagulls
sewage
sewer
shot
steadicam
stream
substance
surface
time
toxic
unhygienic
urban
video
waste
waste-water
water
water's