chemical
dioxide
distillery
energy
engineer
engineering
environment
equipment
factory
factoryworker
fuel
fuelstorage
fueltanks
gas
gasindustry
gasrefinery
globalwarming
hardhat
industrial
industrialplant
industrialworker
industry
mechanic
metal
oil
oilrefinery
oilworker
petrochemical
pipelines
pipes
plant
plantworker
pollution
power
pump
refinery
steel
technology
toxic
toxicsubstance
worker