英文關鍵字
air
building
business
carbon
causing
chimney
climate
cloudy
coal
construction
contamination
danger
dioxide
dirty
ecological
ecology
emission
energy
enterprise
environmental
exhaust
factory
fuel
fumes
gas
global
greenhouse
heat
industrial
industry
metal
pipe
pipeline
pipes
plant
pollution
power
problems
production
refinery
smog
smoke
station
steam
steampunk
technology
toxic
vapor
warming
waste