英文關鍵字
background
chemical
dirty
discharge
discharging
ecology
effluent
engineering
environment
environmental
flow
fuel
garbage
green
greenpeace
industrial
industry
liquid
oil
pipe
plant
pollution
power
production
pump
recycling
removal
sedimentation
sewage
site
slimy
sludge
smell
smelly
smoke
stink
system
treatment
turbid
turbidity
waste
wastewater
water