air
burning
carbon
carbon dioxide
chemical
chimney
climate
damage
dioxide
dirty
districtheating
emission
energy
environment
environmental
evaporation
exhaust
factory
fuel
fumes
gas
global
globalwarming
greenhouse
heating
heavy
industrial
industry
manufacturing
pipe
plant
pollution
power
powerstation
sky
smog
smoke
station
steam
sun
sunshine
technology
tower
tube
vertical