building

business

chemical

chemistry

construction

day

drilling

energy

engineering

environment

equipment

factory

field

fossil

fuel

gas

gasoline

generation

industrial

industry

line

manufacturing

metal

natural

oil

people

petrochemical

petrol

petroleum

pipe

pipeline

plant

pollution

power

production

refinery

rig

sky

smoke

station

steel

storage

supply

tank

technology

tower

toxic

tube

water

well