chemical
chimney
color
colorfull
complex
diesel
dioxide
dioxine
distill
distilling
economy
energy
environment
environmental
exhaust
factory
fuel
fumes
gas
gasoline
global
industrial
industry
manufacture
manufacturing
marufacturing
oil
petrochemical
petrol
petroleum
pipe
plant
pollution
power
process
processing
production
refine
refinery
refining
site
sky
smog
smokestack
stack
stainless
steam
steel
tank
technology