air
architecture
chemical
chemistry
chimney
complex
cooling
diesel
dioxin
distillation
distillery
energy
environment
exterior
factory
fuel
gas
gasoline
global
industrial
industry
kyoto
machinery
manufacture
metal
oil
outdoors
petrol
petroleum
pipe
plant
pollute
pollution
power
production
refine
refinery
sky
smoke
smokestack
stack
steam
steel
structure
technical
technology
tower
tube
warming
working