英文關鍵字
aerial
air
atmosphere
chemical
chimney
city
cityscape
construction
cooling
damage
danger
dioxide
dirty
ecology
emissions
energy
environment
environmental
exhaust
factory
fumes
gas
generation
heating
industrial
industry
infrastructure
landmark
manufacture
manufacturing
metropolis
pipe
pollution
power
problem
process
season
sky
smog
smoke
station
structure
technology
tube
urban
view
water
white
winter
working