atmosphere
auto
chemical
chemistry
chimney
climate
coal
concept
condensation
cooling
dioxin
distillation
distillery
drill
ecology
energy
engineering
environment
factory
fossil
fuel
fumes
gas
global
industrial
industry
oil
petrochemical
petrol
petroleum
pipe
plant
pollute
pollution
power
production
refine
refinery
smog
smoke
smokestack
stack
station
steel
structure
technical
technology
tower
toxic
warming