abandoned
chemical
clean
construction
derelict
dirty
electricity
energy
engineering
environment
equipment
facility
factory
fuel
gas
heat
heavy
industrial
industry
insulation
iron
line
manufacturing
metal
oil
pipe
pipeline
piping
plant
pollution
power
processing
pump
purification
purified
purity
recycling
resources
sewage
stainless
steel
system
technology
transportation
treatment
tube
waste
water