英文關鍵字
atmosphere
blue
building
chimney
city
climate
cloud
dioxide
dirt
ecology
electric
electrical
electricity
emission
emissions
energy
environment
exhaust
factory
fog
fuel
fume
gas
generator
global
heating
industrial
industry
landscape
manufacturing
nature
pipe
plant
pollution
power
production
sky
smog
smoke
smoking
station
steam
technology
temperature
thermal
tower
toxic
vapor
vapour
vertical
video
warming