burner
catalyst
catalytic
chemical
chimney
complex
corporate
corporation
dead
distill
dusk
emission
energy
engine
environment
environmental
evening
factory
fuel
fume
gas
gasoline
global
grass
heavy
industrial
industry
kyoto
landscape
manufacturing
metal
oil
petrochemical
petroleum
pipes
plant
pollution
power
process
production
refinery
site
sky
smog
smoke
station
steam
technology
vapor
warming