英文關鍵字
clarifier
conservation
contaminants
convert
cycle
dirty
disposal
drainage
effluent
environment
environmental
facility
green
human
infrastructure
plant
plants
pollution
process
purification
rainwater
recirculation
reclamation
recycle
refinery
sedimentation
sewage
sludge
solid
station
stormwater
system
tank
treatment
used
waste
wastewater
water
works