accident

air

business

chemical

chemistry

chimney

coal

coke

construction

danger

destroy

distillation

ecological

ecology

electric

energy

environment

environmental

equipment

factory

fumes

gas

global

heavy

industrial

industry

iron

life

manufacture

metal

metalurgy

nature

oil

pipe

plant

polluted

pollution

power

production

refinery

smoke

station

steam

steel

structure

technology

tower

toxic

warming

work