英文關鍵字
aerial
air
architecture
atmosphere
boiler
building
business
chemical
chimney
city
cityscape
climate
cold
construction
contamination
day
dioxide
dirty
district
drone
ecology
electricity
emissions
energy
engineering
environment
environmental
factory
frost
global
heating
house
industrial
industry
nature
outdoor
pipe
pipeline
plant
pollution
power
river
room
russia
sky
smog
smoke
smokestack
snow
steam
steamshop
sunset
technology
tower
town
toxic
tube
urban
white
winter
zone