機器
environmental
air
alternative
black
carbon
chemical
chimney
chimneys
co2
coal
contaminant
contaminate
cooling
dioxide
distill
distilling
electricity
emission
energy
environment
exhaust
factory
fossil
fuel
fume
gas
generate
generator
global
industrial
industry
mill
nature
night
outdoor
petrol
pipe
pipes
plant
pollutant
pollute
pollution
power
production
refinery
scenery
site
sky
smog
smoke
smokestack
smokestacks
stack
station
steam
technical
technology
tower
toxic
vapour
warming
waste
watts