air
chemical
chemical plant
chemicals
chimney
company
complex
cooling
crude
detroit
dioxide
distillation
distillery
energy
environment
environmental
equipment
europe
factory
fingers
fuel
gas
gasoline
global
greenhouse
holland
industrial
industry
metal
michigan
oil
oil and gas
oil refinery
petrochemical
petrol
pipe
plant
planting
plants
pollute
pollution
power
power plant
powerplant
production
refinery
rotterdam
sky
smoke
smokestack
stack
steam
steel
technology
tower
warming
working