英文關鍵字
bad
bubbles
chemical
chemicals
clean
cleanup
damage
danger
dangerous
dirty
energy
environment
environmental
facility
factory
feces
flowing
flows
frothing
industrial
into
liquid
out
pipe
pipes
plant
poison
poisonous
polluted
polluting
pollution
processing
product
pumped
pumping
river
ruined
ruining
sewage
spill
toxic
trash
ugly
waste
water