blue
chemical
chemistry
chimney
construction
crane
energy
engineer
engineering
environment
equipment
factory
fuel
gas
gasoline
global
heavy
industrial
industry
light
manufacturing
metal
night
oil
petrochemical
petroleum
pipe
pipeline
plant
pollutant
pollute
pollution
production
refine
refinery
river
ship
shipyard
sky
steam
storage
structure
sustainability
tank
technology
tower
water
worker