business
carbon
chemical
chemistry
chimney
construction
diesel
distillation
distillery
ecology
energy
engineer
environment
equipment
factory
fuel
gas
gasoline
global
green
heavy
industrial
industry
light
manufacture
manufacturing
natural
oil
petrochemical
petrol
petroleum
pipe
plant
pollutant
pollute
pollution
power
production
refine
refinery
smoke
stack
station
steam
steel
storage
structure
supply
technology
tube