英文關鍵字
background
canal
concrete
construction
control
dam
day
development
dirt
dirty
drain
drainage
ecology
energy
environment
environmental
flow
flowing
global
industrial
industry
irrigation
mountain
natural
nature
outdoor
pipe
plant
poison
polluted
pollution
pour
power
release
river
runoff
sewage
site
stone
stream
toxic
tube
underground
urban
wall
waste
water
waterfall
wet