英文關鍵字
air
at
atmosphere
background
building
chimneys
climate
eco
ecology
ecosystem
energy
environment
factory
fog
from
fuel
gas
global
industrial
industry
lapse
metal
morning
moving
nature
nobody
outdoor
outside
plant
power
powerful
production
rust
smog
smoke
smokestacks
steel
sunrise
texture
time
timelapse
town
urban
warming
works