英文關鍵字
air
architecture
atmosphere
background
boiler
building
chimney
chimneys
city
climate
cloud
cranes
ecology
energy
environment
environmental
factory
footage
furnace
global
heating
horizon
icon
industrial
industry
landscape
light
manufacturing
many
neutral
pipe
plant
pollution
power
shaft
sky
skyline
smog
smoke
smoking
stack
station
steam
stock
technology
tower
video
view
warming
white
winter