blue
building
cable
catalyst
catalytic
chemical
chimney
coal
complex
construction
corporate
corporation
distribution
dusk
electric
electricity
emission
energy
environment
environmental
factory
fuel
fume
gas
gasoline
global
heavy
high
industrial
industry
konin
petrochemical
petroleum
plant
poland
polish
pollute
pollution
process
production
pylon
refinery
site
sky
smog
smoke
smokestack
stack
station
steam
steamboiler
structure
technology
two
vapor
voltage
warming
water
watt