英文關鍵字
atmosphere
building
charcoal
chimney
city
cleaning
cloud
coal
construction
contemporary
cooling
ecology
electric
energy
engineer
environment
exhalation
factory
filter
gas
global
industrial
landscape
modern
moscow
pole
pollution
power
produce
sky
skyline
smog
smokestack
stack
station
steam
technology
thermal
tower
transmission
voltage
warming
warning
waste
wire
time
lapse
timelapse