air
blue
chemical
chimney
co2
company
concept
dark
dioxide
dioxin
distill
distillation
energy
environment
environmental
factory
fuel
gas
gasoline
gdask
industrial
industry
light
night
oil
petrol
pipe
plant
poland
polish
pollute
pollution
power
produce
production
refinery
reflections
river
scene
science
smoke
smokestack
steam
tank
technology
tower
tube
warming