英文關鍵字
careless
chemical
cost
crime
criminal
danger
dirt
dirty
disaster
drain
dump
earths
ecology
energy
factory
fatal
flow
flowing
forbidden
garbage
global
illegal
industrial
industry
influence
life
liquid
pipe
pipeline
place
plastic
pollute
polluted
pollution
pouring
problem
protection
refinery
resource
runoff
rust
sewerage
sticks
stream
street
substance
technology
the
toxic
tube
ugliness
unhygienic
urban
wall
warming
waste
water