acid
air
asthmatic
blue
chemical
chimney
climate
coal
construction
contamination
damage
deleterious
demolish
dioxide
dirty
ecology
emissions
environment
environmental
factory
fuel
fumes
gas
global
greenhouse
growth
high
industrial
industry
intoxication
ozone
pipe
poison
pollution
power
red
refinery
sky
smog
smoke
stack
station
steam
technology
tower
toxic
trail
up
warming
white