air
architecture
building
chimney
cloud
coalfired
cooling
damage
danger
district
electricity
emitting
environment
environmental
europe
factory
fog
fossil
fuel
fume
germany
global
heap
industrial
industry
lawn
meadow
nobody
outdoors
places
plant
pole
pollution
power
premises
recklinghausen
risk
ruhr
smog
smoke
stack
station
steam
tall
threat
tower
toxic
warming
work