英文關鍵字
pipes
industrial
plant
thick
smoke
cloudy
sky
steam
supply
electrical
wire
cable
electric
pipe
ecology
electricity
smog
fume
global
toxic
gas
emissions
atmosphere
industry
tower
technology
landscape
environment
pollution
clouds
factory
contamination
soiling
dirty
air
energy
harmful
production
manufacture
danger
environmental
protection
background
chimney
power
high
voltage
transmission
lines
nature
outdoors
motion
wires