air
burner
business
chemical
chimney
complex
corporate
corporation
emission
energy
engine
environment
environmental
factory
fuel
fume
gas
gasoline
global
harbor
heavy
high
industrial
industry
landscape
manufacturing
metal
nature
netherlands
oil
petroleum
pipes
plant
pollution
port
process
production
refinery
site
sky
smog
smoke
steam
structure
technology
vapor
warming