英文關鍵字
atmosphere
boiler
chemical
chimneys
city
climate
coal
cooling
dirty
ecology
electric
electricity
emissions
energy
environment
factory
five
fog
fuel
high
house
industrial
industry
manufacturing
over
pipeline
pipes
pollution
power
room
silhouette
sky
smog
smoke
smokestack
smoking
station
steam
steel
sun
technology
thermal
top
tower
toxic
view
warming