英文關鍵字
air
airpollution
black
building
chimney
complex
contamination
damage
dark
decadence
decay
dirty
disaster
dust
effect
energy
environment
environmental
facility
factory
gas
greenhouse
heavy
industrial
industrialized
industry
iron
metallurgy
old
plant
pollution
power
produce
production
rusty
smog
smoke
steel
structure
thick